Question to the HM Treasury:

To ask the Chancellor of the Exchequer, what assessment she has made of the potential impact of leaving the European (a) Union, (b) Customs Union and (c) Single Market on (i) imports and (ii) exports.

The OBR has estimated the difference in level of imports and exports had the UK not withdrawn from the EU. That estimate is available at this link: OBR Economic and fiscal report March 2021. The most recent report is the Economic and fiscal report October 2024. Additional OBR Economic and fiscal reports can be found here.