I am British, I have an FAA PPL (my only flying licence), I am domiciled overseas.
My question is simple - assuming I can find someone to rent me an airplane - can I legally do so in the UK.
Simply; Yes, the UK ANO Art 150 allows the holder of an ICAO licence to fly UK Annex II aircraft indefinitely and the current EASA rule allows the holder of an ICAO licence to fly an EASA aircraft up to the 8th April 2017, subject to the decision of the NAA registering the aircraft. The UK CAA is now likely to extend this to April 2019.