Depending on your views and if you consider UK to be in Europe there is a nice, welcoming naturist campsite called Acorns in Devon worth a visit.
It is off the beaten track but there are lots of places to visit nearby if the weather isn't the best for chilling out and getting that all over tan, Andy and Cathy have worked hard over the last few years establishing it.
I understand what you are saying Pilgy and as a much younger person I spent many happy days in the UK, enjoying the Naturist scene, mostly in Hertfordshire. Sadly, once having enjoyed the warmer climate to be experienced south of Paris, my wife and I have become a lost cause. A bit like swimming in the sea off the Welsh coast, then enjoying the Mediterranean. There is little chance of us going back.