Incidentally, the UK CAA's 'not more than 3 flights and all with the same instructor' clause will probably change under the latest EASA NPA - to become 'refresher training of at least 1 hour of total flight time with an instructor. Applicants shall be exempted from this flight if they have passed a class or type rating proficiency check, or skill test or assessment of competence in any other class or type of aeroplane.'
So, no limit on the number of instructors or maximum number of flights - which should make things easier for many.