Good Evening Mike
Thank you for your swift reply, which is very much appreciated.
I have used the site you suggest many times, and found it very helpful and interesting. However it does not contain transcriptions for the period I am now researching, from 1770 to 1812.
As you say, they will probably be held at the National Archives in Wales, and I will try to search there on my next visit to the UK.
My thanks again
Kind Regards
Colin