Home » Outages » TDR (Trader Dress Rehearsal) Planned Downtime

TDR (Trader Dress Rehearsal) Planned Downtime

Historic - 11:00, 28th July 2026 - 15:00, 28th July 2026

Albacore have been advised that 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 until 16:00 BST on Tuesday 28th July 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 28thJuly. Refreshing UK/EU Tariff data, using data which has been copied from Production on Wednesday 15th July. 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.

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