Question to the HM Treasury:

To ask the Chancellor of the Exchequer, how much additional funding through the Barnett Formula will the Welsh government receive from regional transport infrastructure funding in England announced on 4 June 2025.

The Barnett formula is applied when departmental budgets change – not when departments announce how they are spending their budgets.

When changes to the Department for Transport’s budget are confirmed at Spending Review 2025 on 11 June, the Barnett formula will be applied in the usual way.

The published Block Grant Transparency document provides a detailed breakdown of how the block grants are calculated and the next version will be published in due course.