Last week the EU (Withdrawal) Bill passed its second reading. A report by the House of Commons library has predicted the bill is likely to be "one of the largest legislative projects ever undertaken in the UK." Swathes of UK law "will no longer work" on exit, for example because they refer to EU institutions.
There are believed to be 12,000 EU regulations (one type of EU law) in force, while Parliament has passed 7,900 statutory instruments implementing EU legislation and 186 acts which incorporate a degree of EU influence.
Oli Dugmore spoke to Michael Tscherny, a partner in a Brussels based EU affairs consultancy. A former journalist and EU official, he was spokesperson and adviser to Mario Monti.
A German national, he is fluent in English and French as well as having a basic knowledge of Dutch and Italian and can understand Spanish and Portuguese.
Oli had a conversation with him in English about the formerly Great Repeal bill.