TDR (Trader Dress Rehearsal) Planned Downtime
HMRC will be completing a maintenance update to the CDS Trader Dress Rehearsal (TDR) service.
The outage is expected to last 4 hours, from 12:00 hrs BST until 16:00 hrs BST on Tuesday 11th August 2026.
During this maintenance HMRC will be refreshing the following data in TDR:
Trader personal, account, and licensing data, using data which has been copied from Production on Tuesday 11th August.
* 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.
Issued by Albacore on behalf of HMRC








