Deliberately misleading advice
Pace,
I don't know whether this is relevant to your question.
Back in 2001, I was considering my return to private flying after a break of many years.
At that time, I was considering doing the FAA PPL (instead of renewing my UK PPL) and then coming back to the UK and buying into an 'N Reg' group.
I mentioned this idea to an instructor at one of the clubs. This person told me that if I owned a US registered aircraft in the UK, I would only be permitted to fly it for six months in any year. This was plainly a lie.
Later, I learned that many UK flying instructors resent people going abroard for their training and resent people owning US registered aircraft in the UK. These people will tell you any old rubbish just to put you off.
Broomstick.