Thanks Grant,
Cloud coverage tables would be useful. An area I had looked at is the South West cost peninsular of Pembrokeshire- Dale through to Tenby, but it’s surprising how much of an effect the lights of Pembroke power station and the gas terminals of Milford Haven light up the sky. I was born there and can recall from early childhood a fair bit of rain, but there are stretches that have their own micro climate.
I have also been considering the south west.
Until recently I had thought of Spain or Italy, but with the advent of Brexit, that’s a non-starter.
I’ve not even had a mediocre night at my present location for a couple of months.
Eric