Just rejoined the other day so that I can watch some of the great British shows..."Prime Suspect", "Forsyte Saga", "Midsomer Murders", "Inspector Morse"...there are even a few cable dramas that are worth watching.
I loved Forsyte Saga the original BBC
I recommend the British series Foyle's War, The Last Detective and the Inspector Lynley Mysteries. A lot of hours of enjoyment there and Foyle's War has some interesting additional material about what was happening in England during the war.
You could also try a few off the top of my head.
The Sandbaggers: MI-5 during the Carter administration.
Danger! UXB: Aerial bomb disposal during the London Blitz.
Tinker, Tailor, Soldier, Spy: The greatest adaptation of any John LeCarre novel! Alec Guiness was made to play George Smiley. Superb supporting cast.
Jack.