This gets interesting . Reading this the CAA has not said 2 years for EASA license holders to be treated as UK license holders . They have said UP to 2 years and they can cancel this anytime within this period . That means anyone who has swooped there UK licence for an EASA one in anticipation of getting 2 years may well not be able to fly G reg aircraft at the drop of a hat . From 1 jan the French are saying a UK ATPL is not recognised in France , Not even as a PPL . You have to sit various exams , have another medical , flight tests etc to fly a 2 seater . The fact you have a UK ATPL with current SEP IR , FI it’s a big non , desolee .