I am still as confused about this as I was two years ago.
In October 2017, with the info here I visited Earls Colne - I am an FAA PPL and I would like to rent on of your airplanes, a PA28 I own one and have lots of recent time.
They referred me to their expert CFI, who informed me that no I could not rent one of their airplanes and that my licence and experience were woryhless, I would need to do their PPL course etc etc. he even gave me the 40 hours nonsense.
Anyway I am going over in May - past the Brexit date and the April thing.
So can I solo anywhere in the UK, not fussed if G or N registered.
After all the guff last time that resulted in a wasted trip - I am looking for an actual airplane, location, contact name, email, phone number so I can set it up in advance