Taxation (Cross-border Trade) Bill

May I pursue the issue of tariff-rate quotas? Is it not the case that, even if countries receive the same amount in total—if they were previously able to distribute 100 tonnes of goods, and in future they could distribute 70 to the EU and 30 to the UK—they might challenge that on the basis that if the UK market collapses, they will not be able to transfer that amount to another country, as they currently can?