Question to the HM Treasury:

To ask Mr Chancellor of the Exchequer, what estimate his Department has made of the potential effect of leaving the EU Customs Union on UK GDP.

The relationship we build with the EU will be bespoke to the UK. There are of course a number of different models for EU trade relations from which we can learn. We understand the advantages and disadvantages of those models, and are analysing closely the impact which adopting them would have on the UK economy and UK trade. However, the UK and its economy are utterly unique so the deal we secure will be unique too.