UKPN isolation of 132Kv Transformer NUTM T1 for network substation commissioning - Global Switch London
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In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jun 01, 2026 - 08:00 UTC
Jun 01, 2026 - 08:00 UTC
Scheduled - Work Breakdown
01/06/26 circa 08.00 - Isolation of 132KV Transformer NUTM T1
10/06/26 circa 17.00 - Reinstatement of 132KV Transformer NUTM T1
Purpose of Project
To allow UK Power Networks (UKPN) to carry out external network substation commissioning.
Systems Impacted
No building impact is anticipated. All load will be transferred seamlessly onto 132KV Transformer
NUTM T2 with no loss of power
to customers.
Method of Procedure
The switching activities will be coordinated between UK Power Networks and Global Switch
via telephone contact. All switching will be carried out by UK Power Networks to
the Global Switch approved Method of Procedure to ensure a seamless operation when transferring
load from one
transformer to the other.
Work Permits:
This operation is carried out remotely by UK Power Networks and no permits are required.
Risk Analysis
The switching operations will be carried out by UK Power Networks Control and will be
seamless to the Global Switch infrastructure. All switching operations are carried out
upstream of London East incoming supplies and therefore the building will remain DRUPS/UPS
backed at all times.
Mitigation Measures
No switching operations will be permitted unless both UK Power Networks and Global Switch
are happy that the switching does not present any risk to the building load.
Back out Plan
No immediate back out is available once Transformer NUTM T1 is isolated. In the event of an issue
with NUTM T2
Transformer Global Switch will request UKPN to abort commissioning activities to allow NUTM T1 to
be
returned to service. Recovery time is estimated at 4 hours during working hours and 6 hours at any
other time.
Jun 1, 2026 08:00 - Jun 10, 2026 17:00 UTC
01/06/26 circa 08.00 - Isolation of 132KV Transformer NUTM T1
10/06/26 circa 17.00 - Reinstatement of 132KV Transformer NUTM T1
Purpose of Project
To allow UK Power Networks (UKPN) to carry out external network substation commissioning.
Systems Impacted
No building impact is anticipated. All load will be transferred seamlessly onto 132KV Transformer
NUTM T2 with no loss of power
to customers.
Method of Procedure
The switching activities will be coordinated between UK Power Networks and Global Switch
via telephone contact. All switching will be carried out by UK Power Networks to
the Global Switch approved Method of Procedure to ensure a seamless operation when transferring
load from one
transformer to the other.
Work Permits:
This operation is carried out remotely by UK Power Networks and no permits are required.
Risk Analysis
The switching operations will be carried out by UK Power Networks Control and will be
seamless to the Global Switch infrastructure. All switching operations are carried out
upstream of London East incoming supplies and therefore the building will remain DRUPS/UPS
backed at all times.
Mitigation Measures
No switching operations will be permitted unless both UK Power Networks and Global Switch
are happy that the switching does not present any risk to the building load.
Back out Plan
No immediate back out is available once Transformer NUTM T1 is isolated. In the event of an issue
with NUTM T2
Transformer Global Switch will request UKPN to abort commissioning activities to allow NUTM T1 to
be
returned to service. Recovery time is estimated at 4 hours during working hours and 6 hours at any
other time.
Jun 1, 2026 08:00 - Jun 10, 2026 17:00 UTC
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No data exists for this day.
had a major outage.
had a partial outage.
Scheduled Maintenance
Pure Storage Upgrade - NO2-A12-A-21-40, Bulk, Norway Jun 10, 2026 07:00-15:00 UTC
Maintenance Window:
* 10th June 2026, 07:00–15:00 UTC
Reason for Maintenance:
We will be upgrading our Pure Storage array from version 6.5.4 to the latest required version. This upgrade addresses a known issue involving a Token Exchange service memory leak, which can impact the array management interface.
Expected Duration:
Up to 8 hours per maintenance window.
Scope of Work:
The upgrade will be performed by Pure Storage engineers.
Expected Impact:
The storage environment is designed with redundancy and the upgrade will be carried out on one controller at a time. As a result, we do not expect a complete loss of service. However, there is a small risk of temporary disruption. In rare cases:
* A host may lose connectivity despite multipathing protections
* This could cause the system to enter a read-only file system state
* A reboot of the affected host may be required, resulting in brief downtime
Mitigation Measures:
We will actively monitor the upgrade throughout the maintenance window. If any hosts are affected, we will take immediate action, including rebooting servers where necessary, to minimise impact and restore normal service as quickly as possible.
Communication Plan:
We will provide updates during the maintenance window and a confirm once all work has been successfully completed.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on May 26, 2026 - 09:16 UTC
* 10th June 2026, 07:00–15:00 UTC
Reason for Maintenance:
We will be upgrading our Pure Storage array from version 6.5.4 to the latest required version. This upgrade addresses a known issue involving a Token Exchange service memory leak, which can impact the array management interface.
Expected Duration:
Up to 8 hours per maintenance window.
Scope of Work:
The upgrade will be performed by Pure Storage engineers.
Expected Impact:
The storage environment is designed with redundancy and the upgrade will be carried out on one controller at a time. As a result, we do not expect a complete loss of service. However, there is a small risk of temporary disruption. In rare cases:
* A host may lose connectivity despite multipathing protections
* This could cause the system to enter a read-only file system state
* A reboot of the affected host may be required, resulting in brief downtime
Mitigation Measures:
We will actively monitor the upgrade throughout the maintenance window. If any hosts are affected, we will take immediate action, including rebooting servers where necessary, to minimise impact and restore normal service as quickly as possible.
Communication Plan:
We will provide updates during the maintenance window and a confirm once all work has been successfully completed.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on May 26, 2026 - 09:16 UTC
Preventative UPS maintenance - nLighten Chester Jun 10, 2026 08:00 - Jun 11, 2026 16:00 UTC
Preventative UPS maintenance - nLighten Chester
Maintenance start: 10/08/2026 08:00
Maintenance end: 11/08/20206 16:00
Location: Chester, UK, Data Hall 2
Please be advised that nLighten and our specialist vendor will be carrying out preventative maintenance to the four UPS systems associated with your infrastructure.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on Jun 08, 2026 - 07:52 UTC
Maintenance start: 10/08/2026 08:00
Maintenance end: 11/08/20206 16:00
Location: Chester, UK, Data Hall 2
Please be advised that nLighten and our specialist vendor will be carrying out preventative maintenance to the four UPS systems associated with your infrastructure.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on Jun 08, 2026 - 07:52 UTC
Pure Storage Upgrade - NO2-A12-A-22-40, Bulk, Norway Jun 11, 2026 07:00-15:00 UTC
Maintenance Window:
* 11th June 2026, 07:00–15:00 UTC
Reason for Maintenance:
We will be upgrading our Pure Storage array from version 6.5.4 to the latest required version. This upgrade addresses a known issue involving a Token Exchange service memory leak, which can impact the array management interface.
Expected Duration:
Up to 8 hours per maintenance window.
Scope of Work:
The upgrade will be performed by Pure Storage engineers.
Expected Impact:
The storage environment is designed with redundancy and the upgrade will be carried out on one controller at a time. As a result, we do not expect a complete loss of service. However, there is a small risk of temporary disruption. In rare cases:
* A host may lose connectivity despite multipathing protections
* This could cause the system to enter a read-only file system state
* A reboot of the affected host may be required, resulting in brief downtime
Mitigation Measures:
We will actively monitor the upgrade throughout the maintenance window. If any hosts are affected, we will take immediate action, including rebooting servers where necessary, to minimise impact and restore normal service as quickly as possible.
Communication Plan:
We will provide updates during the maintenance window and a confirm once all work has been successfully completed.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on May 26, 2026 - 09:17 UTC
* 11th June 2026, 07:00–15:00 UTC
Reason for Maintenance:
We will be upgrading our Pure Storage array from version 6.5.4 to the latest required version. This upgrade addresses a known issue involving a Token Exchange service memory leak, which can impact the array management interface.
Expected Duration:
Up to 8 hours per maintenance window.
Scope of Work:
The upgrade will be performed by Pure Storage engineers.
Expected Impact:
The storage environment is designed with redundancy and the upgrade will be carried out on one controller at a time. As a result, we do not expect a complete loss of service. However, there is a small risk of temporary disruption. In rare cases:
* A host may lose connectivity despite multipathing protections
* This could cause the system to enter a read-only file system state
* A reboot of the affected host may be required, resulting in brief downtime
Mitigation Measures:
We will actively monitor the upgrade throughout the maintenance window. If any hosts are affected, we will take immediate action, including rebooting servers where necessary, to minimise impact and restore normal service as quickly as possible.
Communication Plan:
We will provide updates during the maintenance window and a confirm once all work has been successfully completed.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on May 26, 2026 - 09:17 UTC
Pure Storage Upgrade - NO2-A12-A-23-40, Bulk, Norway Jun 12, 2026 07:00-15:00 UTC
Maintenance Window:
* 12th June 2026, 07:00–15:00 UTC
Reason for Maintenance:
We will be upgrading our Pure Storage array from version 6.5.4 to the latest required version. This upgrade addresses a known issue involving a Token Exchange service memory leak, which can impact the array management interface.
Expected Duration:
Up to 8 hours per maintenance window.
Scope of Work:
The upgrade will be performed by Pure Storage engineers.
Expected Impact:
The storage environment is designed with redundancy and the upgrade will be carried out on one controller at a time. As a result, we do not expect a complete loss of service. However, there is a small risk of temporary disruption. In rare cases:
* A host may lose connectivity despite multipathing protections
* This could cause the system to enter a read-only file system state
* A reboot of the affected host may be required, resulting in brief downtime
Mitigation Measures:
We will actively monitor the upgrade throughout the maintenance window. If any hosts are affected, we will take immediate action, including rebooting servers where necessary, to minimise impact and restore normal service as quickly as possible.
Communication Plan:
We will provide updates during the maintenance window and a confirm once all work has been successfully completed.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on May 26, 2026 - 09:18 UTC
* 12th June 2026, 07:00–15:00 UTC
Reason for Maintenance:
We will be upgrading our Pure Storage array from version 6.5.4 to the latest required version. This upgrade addresses a known issue involving a Token Exchange service memory leak, which can impact the array management interface.
Expected Duration:
Up to 8 hours per maintenance window.
Scope of Work:
The upgrade will be performed by Pure Storage engineers.
Expected Impact:
The storage environment is designed with redundancy and the upgrade will be carried out on one controller at a time. As a result, we do not expect a complete loss of service. However, there is a small risk of temporary disruption. In rare cases:
* A host may lose connectivity despite multipathing protections
* This could cause the system to enter a read-only file system state
* A reboot of the affected host may be required, resulting in brief downtime
Mitigation Measures:
We will actively monitor the upgrade throughout the maintenance window. If any hosts are affected, we will take immediate action, including rebooting servers where necessary, to minimise impact and restore normal service as quickly as possible.
Communication Plan:
We will provide updates during the maintenance window and a confirm once all work has been successfully completed.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on May 26, 2026 - 09:18 UTC
Pure Storage Upgrade - NO2-A12-A-24-40, Bulk, Norway Jun 13, 2026 07:00-15:00 UTC
Maintenance Window:
* 13th June 2026, 07:00–15:00 UTC
Reason for Maintenance:
We will be upgrading our Pure Storage array from version 6.5.4 to the latest required version. This upgrade addresses a known issue involving a Token Exchange service memory leak, which can impact the array management interface.
Expected Duration:
Up to 8 hours per maintenance window.
Scope of Work:
The upgrade will be performed by Pure Storage engineers.
Expected Impact:
The storage environment is designed with redundancy and the upgrade will be carried out on one controller at a time. As a result, we do not expect a complete loss of service. However, there is a small risk of temporary disruption. In rare cases:
* A host may lose connectivity despite multipathing protections
* This could cause the system to enter a read-only file system state
* A reboot of the affected host may be required, resulting in brief downtime
Mitigation Measures:
We will actively monitor the upgrade throughout the maintenance window. If any hosts are affected, we will take immediate action, including rebooting servers where necessary, to minimise impact and restore normal service as quickly as possible.
Communication Plan:
We will provide updates during the maintenance window and a confirm once all work has been successfully completed.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on May 26, 2026 - 09:19 UTC
* 13th June 2026, 07:00–15:00 UTC
Reason for Maintenance:
We will be upgrading our Pure Storage array from version 6.5.4 to the latest required version. This upgrade addresses a known issue involving a Token Exchange service memory leak, which can impact the array management interface.
Expected Duration:
Up to 8 hours per maintenance window.
Scope of Work:
The upgrade will be performed by Pure Storage engineers.
Expected Impact:
The storage environment is designed with redundancy and the upgrade will be carried out on one controller at a time. As a result, we do not expect a complete loss of service. However, there is a small risk of temporary disruption. In rare cases:
* A host may lose connectivity despite multipathing protections
* This could cause the system to enter a read-only file system state
* A reboot of the affected host may be required, resulting in brief downtime
Mitigation Measures:
We will actively monitor the upgrade throughout the maintenance window. If any hosts are affected, we will take immediate action, including rebooting servers where necessary, to minimise impact and restore normal service as quickly as possible.
Communication Plan:
We will provide updates during the maintenance window and a confirm once all work has been successfully completed.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on May 26, 2026 - 09:19 UTC
Shut down iBGP peerings between Boden and Lefdal DCs Jun 15, 2026 04:00-04:10 UTC
We will shut down the iBGP peerings between Boden and Lefdal DCs.
Maintenance window: 2020-06-15 04:00 UTC
Duration: 10 minutes
All the Boden and Lefdal services are now fully separated and do not expect any production issues.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on Jun 09, 2026 - 06:15 UTC
Maintenance window: 2020-06-15 04:00 UTC
Duration: 10 minutes
All the Boden and Lefdal services are now fully separated and do not expect any production issues.
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on Jun 09, 2026 - 06:15 UTC
UPS Test - Bulk DC (ndcloud-odin) Jun 15, 2026 07:00 - Jun 28, 2026 16:00 UTC
There will be conducted alarm testing on the UPS's for DCM101. Buld DC will test 1 by 1 battery rack, on 1 UPS at the time, which will not give any operational disturbance. There will be a slight reduction in UPS capacity, but Buld DC will still have more than enough to support the current load.
The reason is to verify alarms and safety function of the UPS's.
The work will start week 25 and continue to end week 26
Location: N01.DCM101
Start time and date: 2026-06-15 08:00 CEST
Stop time and date: 2026-06-28 17:00 CEST
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on Jun 02, 2026 - 06:08 UTC
The reason is to verify alarms and safety function of the UPS's.
The work will start week 25 and continue to end week 26
Location: N01.DCM101
Start time and date: 2026-06-15 08:00 CEST
Stop time and date: 2026-06-28 17:00 CEST
If you have any concerns during this maintenance window, please contact Taiga Cloud Customer Support via the ticket portal or email cloud-support@taigacloud.com.
Posted on Jun 02, 2026 - 06:08 UTC
Scheduled Maintenance - Chester, UK Jun 22, 2026 07:00 - Jun 25, 2026 16:00 UTC
Maintenance Window:
22/06/2026 07:00 UTC – 25/06/2026 16:00 UTC
Location & Affected Areas:
• Site: nLighten Chester – United Kingdom
• Impacted Area: Data Hall 2
Description:
Preventative maintenance involving inspection and remedial works on SW/BDs 1, 2, 3, and 5.
Works will be carried out over four days, with one SW/BD isolated per day. During each isolation, a 1N power supply will be removed from listed ND cabinets within Data Hall 2.
* 22/06/2026 – SW/BD 2 Isolation, inspection, and remedial works.
Affected cabinets:
• Row 1: 1, 4, 5, 6, 9, 12, 13, 16, 17, 18, 21, 24, 25, 28, 29, 30, 33, 36
• Row 2: 3, 6, 7, 10, 11, 12, 15, 18, 19, 22, 23, 24, 27, 30, 31, 34, 35, 36
* 23/06/2026 – SW/BD 1 Isolation, inspection, and remedial works.
Affected cabinets:
• Row 1: 1, 2, 3, 6, 8, 11, 13, 14, 15, 18, 20, 23, 25, 26, 27, 30, 32, 35
• Row 2: 2, 5, 7, 8, 9, 12, 14, 17, 19, 20, 21, 24, 26, 29, 31, 32, 33, 36
* 24/06/2026 – SW/BD 3 Isolation, inspection, and remedial works.
Affected cabinets:
• Row 1: 2, 4, 7, 8, 9, 10, 14, 16, 19, 20, 21, 22, 26, 28, 31, 32, 33, 34
• Row 2: 1, 2, 3, 4, 8, 10, 13, 14, 15, 16, 20, 22, 25, 26, 27, 28, 32, 34
* 25/06/2026 – SW/BD 5 Isolation, inspection, and remedial works.
Affected cabinets:
• Row 1: 3, 5, 7, 10, 11, 12, 15, 17, 19, 22, 23, 24, 27, 29, 31, 34, 35, 36
• Row 2: 1, 4, 5, 6, 9, 11, 13, 16, 17, 18, 21, 23, 25, 28, 29, 30, 33, 35
Posted on May 28, 2026 - 14:49 UTC
22/06/2026 07:00 UTC – 25/06/2026 16:00 UTC
Location & Affected Areas:
• Site: nLighten Chester – United Kingdom
• Impacted Area: Data Hall 2
Description:
Preventative maintenance involving inspection and remedial works on SW/BDs 1, 2, 3, and 5.
Works will be carried out over four days, with one SW/BD isolated per day. During each isolation, a 1N power supply will be removed from listed ND cabinets within Data Hall 2.
* 22/06/2026 – SW/BD 2 Isolation, inspection, and remedial works.
Affected cabinets:
• Row 1: 1, 4, 5, 6, 9, 12, 13, 16, 17, 18, 21, 24, 25, 28, 29, 30, 33, 36
• Row 2: 3, 6, 7, 10, 11, 12, 15, 18, 19, 22, 23, 24, 27, 30, 31, 34, 35, 36
* 23/06/2026 – SW/BD 1 Isolation, inspection, and remedial works.
Affected cabinets:
• Row 1: 1, 2, 3, 6, 8, 11, 13, 14, 15, 18, 20, 23, 25, 26, 27, 30, 32, 35
• Row 2: 2, 5, 7, 8, 9, 12, 14, 17, 19, 20, 21, 24, 26, 29, 31, 32, 33, 36
* 24/06/2026 – SW/BD 3 Isolation, inspection, and remedial works.
Affected cabinets:
• Row 1: 2, 4, 7, 8, 9, 10, 14, 16, 19, 20, 21, 22, 26, 28, 31, 32, 33, 34
• Row 2: 1, 2, 3, 4, 8, 10, 13, 14, 15, 16, 20, 22, 25, 26, 27, 28, 32, 34
* 25/06/2026 – SW/BD 5 Isolation, inspection, and remedial works.
Affected cabinets:
• Row 1: 3, 5, 7, 10, 11, 12, 15, 17, 19, 22, 23, 24, 27, 29, 31, 34, 35, 36
• Row 2: 1, 4, 5, 6, 9, 11, 13, 16, 17, 18, 21, 23, 25, 28, 29, 30, 33, 35
Posted on May 28, 2026 - 14:49 UTC