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On the 29th April 2026, there will be a system outage to enable HMRC to deploy a fix. This outage will be between 21:30 and 23:00.
The system will be restored once the outage is complete, and the new CDS release, version 5.1.0.2, will be deployed.
There is no change to the published guidance during this fix prior to the 5.1.0.2 update.
Following this update, changes previously advised under excise duty, which were updated in CDS version 5.1.0, released on the 29th March 2026, can be used from the 29th April 2026.
During the outage, any pre-lodged declarations may be affected.
Any pre-lodged declarations that will arrive on or after this release could be affected by the 5.1.0.2 changes and should be amended prior to arrival.
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