Interesting Radio 4 "Law in Action" today talking about the extent of complications involved. Passing the Great Repeal Act is only the start of the process and there are an unknown number of laws that will still be linked to EU processes and procedures, so it could well take - my interpretation here - a decade or more to sort the bulk of it, not including various EU standards we agree to for practical reasons, not because we bound to by agreement. It is worth a listen for anyone who thinks the exit from EU law is easy, or even just moderately complicated.