Planned Maintenance

The list below details any planned disruption to services to the best of our knowledge. Disruption to any of these can impact the performance of Sequoia.

This information can change at very short notice. Unless otherwise specified, all times are local.

Last change to the information on this page: Thursday 16 Apr 2026 11:55

Service

Start time

End time

Details

ASM Online Services

CCS-UK

CDS Live Service

27/04/2026 19:00

27/04/2026 22:00

Planned maintenance on Monday, 27 April 2026 at 20:00 BST to Monday, 27 April 2026 at 23:00 BST

See message from CDS Live Service

HMRC will be carrying out network maintenance between 8pm and 11pm on Monday 27th April 2026.

This work will result in delayed messaging between DEFRA systems (BTMS / IPAFFS) and CDS during the maintenance period.

Messages will be queued and replayed but users may experience a delay.

HMRC apologises for any inconvenience caused.

CDS Test Service (TDR)

21/04/2026 11:00

21/04/2026 15:00

Planned outage on Tuesday, 21 April 2026 at 12:00 BST to Tuesday, 21 April 2026 at 16:00 BST

See message from CDS Test Service (TDR)

Hello,

We are emailing to advise you that the CDS TDR Service will be unavailable from:

12pm on Tuesday 21st April 2026 until 4pm on Tuesday 21st April 2026

There will be a complete outage during this period. Please can you inform your contacts.

Kind regards,

TDR Communications Team

CNS Compass

ICS2

MCP Destin8

NCTS/CTC

Pentant