Some British M.P's say this is only in order to give them time to work through the legislation, so that they can make a considered decision on what E.U. laws to keep and what to ditch/change.
Problem being F10, we are taking 1000's of pieces of legislation and guess where firearms related matters will be .... Yep, right at the bottom of the pile, don't expect it to be looked at for at least 50 years!