They tend (or tended) to go to great lengths to get the correct sound effects on "The Archers". I haven't listened for years but visited the studio in The Mailbox in Brum some years ago. They had a genuine Aga cooker amongst a line of other cookers and numerous household appliances to get the correct sound effect when a pan is placed or a kettle is boiled. Of course there was the inevitable panel with different door knockers, latches and bells, etc.
There was a story line where one of the characters restored a vintage Ferguson tractor - I don't know how genuine any sound effects might have been for that.
Spoiler alert for any listeners:
Any creaking clanging gate effects are actually provided by an old metal folding ironing board.