During the 1970's, I knew a Welshman in Forest Hill who was a member of the London Welsh male voice choir.
The choir provided a very atmospheric backing for a performance of Under Milk Wood, which was being recorded at the BBC Maida Vale studios for Radio 4 - and he gave me a ticket to attend.
After the recording, we all got together for a few beers and a singalong – ‘twas wonderful boyo!