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 30 Jun 2026 11:52

Service Start time End time Details
ASM Online Services
CCS-UK
CDS Live Service
04/07/2026 19:00 05/07/2026 01:30 Planned outage on to
See message from CDS Live Service

Due to scheduled maintenance the Customs Declaration Service (CDS) will be unavailable to all users from 08:00 pm Saturday 04th July until, 02:30 am on Sunday 05th July 2026.

Declarations should not be submitted during the outage period.

Creating, updating, or embarking a goods movement reference (GMR) during this time might be affected.

Only goods with pre-lodged declarations attached to a GMR will be allowed to move using Goods Vehicle Movement Service (GVMS).


For import movements using GVMS, you should check the declaration status and arrive where needed https://www.gov.uk/guidance/manually-arrive-your-goods-in-the-uk

If moving consignments containing controlled goods with pre-lodged declarations, read:
https://www.gov.uk/guidance/list-of-goods-imported-into-great-britain-from-the-eu-that-are-controlled and, attend port inspection facilities or inland border facilities for goods to be inspected and released.

Exports should have Permission to Progress (P2P) before travelling.

We apologise for any inconvenience this may cause.
CDS Test Service (TDR)
07/07/2026 08:00 08/07/2026 08:00 Planned outage on to
See message from CDS Test Service (TDR)

Good morning,
 
We will be completing a maintenance update to the CDS Trader Dress Rehearsal (TDR) service on Tuesday 7thJuly 2026.
 
The service will be unavailable from 9am on Tuesday 7th July 2026 until 9am on Wednesday 8th July 2026
 
During this maintenance window we will be refreshing the below data held in TDR:  
  
• Where applicable, aligning the CDS TDR environment to Production CDS 5.2.0 Release (which will take place on 4th July 2026)
• Refreshing Trader personal, account, and licensing data held in CDS TDR, using data which will be copied from Production on 7th July 2026
• Refreshing UK/EU Tariff data held in CDS TDR, using data which has been copied from Production on 17th June 2026*
 
* Trader Dress Rehearsal is a sandbox environment and is regularly refreshed with Trader data and data from the Online Tariff on a given date, as such any CDS changes to Trader data in the live service or updates to the Online Tariff will not be reflected in TDR instantaneously.
 
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
14/07/2026 09:00 14/07/2026 11:00 Planned outage on to
See message from Descartes

Notification - CHN-63588 Pentant 26.07 Release EMEA Normal RFC

Dear Descartes Pentant Customer,

From Tue, 14 Jul, 2026 10am UK until Midday, the Pentant team will be executing Pentant 26.07 Release
Regular release cycle of the Pentant Application

Containing back end maintenance and security updates

Questions and concerns can be directed to IMC at IMC@descartes.com
Please reference CHN-63588

Many thanks
Pentant Customer Support