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: Tuesday 05 May 2026 08:34

Service

Start time

End time

Details

ASM Online Services

CCS-UK

CDS Live Service

CDS Test Service (TDR)

CNS Compass

ICS2

MCP Destin8

NCTS/CTC

01/06/2026 06:00

01/06/2026 08:00

Planned outage on Monday, 1 June 2026 at 07:00 BST to Monday, 1 June 2026 at 09:00 BST

See message from NCTS

We will be carrying out planned maintenance on the New Computerised Transit System (NCTS)

Monday 1st June 2026, 7am to 9am:

•NCTS XI – 7am to 9am
•NCTS GB – 7am to 9am

NCTS GB and NCTS XI data submitted during the period above will be held and processed once the maintenance activity has concluded and the service is available again.

Please see NCTS service availability page to check for latest updates on system availability status.

HMRC apologises for any inconvenience.

Pentant