Originally Posted by
piperboy84
It is my own personal aircraft, I brought it with me when I returned to live in the UK.
What do the ramifications of being "caught" mean for me?
You need an EASA licence and IR (if you fly IFR). If it is an aircraft with a type rating, the FAA type rating still works for it. If it is one of the aircraft with an EASA type rating but no FAA comparable type rating (single engine turbines) I think you need to get an EASA type rating. If you live in the UK you have until April 2014 to get sorted (plus a once in a life time 1 year validation you can apply for if you are partway through the training).
If you are in some other country you need to ask the NAA what derogations they have applied for.