Having lived in rural Worcestershire, I find the Archers' dialogue very true to life.
The rich County Types speak in a very pure "received pronunciation" style- sometimes very loudly.
The ordinary folk, brought up in the area, speak with a touch of West Country.
A lot of the incomers have Birmingham or Black Country accents (not the same thing).
And they all use their own vocabulary too, so the same meal, taken between Five and eight p.m. might be "tea", "dinner" or "supper", depending on who you are talking to.
Cheers
Dave
(formerly of Borchester Tech!)