Hi Circlip, I was recalling times a way back and the media was much more controlled. The BGT reference is so that someone can appear very knowledgable, living up to his would be image?
I remember back in 1961 going to a Holiday camp and the last night entertainment was very good with slip ups that were very funny and odd things happening. We were staying there for 2 weeks so when the last Friday came we went to see the Camp Show, totally identical to the previous week. I expect these things did happen and if good were written into the script.
Some 10 years back I went to see 39 Steps the musical it was very funny but the cynical side of me also watched for the included errors, still funny but....
The modern approach is different as you say and the current comedy performers are themselves very adroit at reacting to a flow of ideas. With programmes based on these circumstances. However if you here a bleep to blot out a dodgy word then they must be running delayed in some way. Rarely live though.
Still if something is funny I am all for it and although I have not seen re-enactments of the Navy Lark I do like similar type programmes. One of my favourites is the vintage American Carol Burnett show. They usually had a point where Tim Conway tells a joke it is all rehearsed for timing etc beforehand. However Tim when it came to the live show would often tell a different joke with hilarious consequences. This is the Elephant joke.
https://www.youtube.com/watch?v=3qqE_WmagjYYou see the 4 performers the lady in the mauve is mama and she never has a word in any scripts so this was the first time she actually spoke live.
If you liked this then watch the same show with The Dentist, Harvey Korman was the patient and said he actually wet himself with laughter.
https://www.youtube.com/watch?v=9IUSM4EKcRISorry drifted off thread a bit but maybe some readers might find something new to them.
Regards
Roy