Obligatory mention: TV series Detectorists [0]. [0] https://en.wikipedia.org/wiki/Detectorists
Everyone in it seems to be doing these dodgy "oo ur" West Country farmer caricature. I can't think of a single character with an actual Suffolk accent.
If I compare to The Dig[1], another great film about finding buried treasure in Suffolk[2], Ralph Fiennes nails it[3].
It's like the good ol' days when the BBC used get Rada trained actors to put on "Cockney" accents to represent the working classes.
1. https://www.imdb.com/title/tt3661210/
2. Sutton Hoo, a set of long boats commerating dead Anglo-Saxon kings. Probably the greatest treasure ever found in the UK. https://en.wikipedia.org/wiki/Sutton_Hoo