Foyle's War, a depiction of detective work in England during WWII, streams on Netflix. A truly great series.
Some unsolicited tips on buying from Amazon UK:
British TV is usually a lot cheaper to buy from Amazon UK.
Off the top of my head I can think of only two shows whose DVDs are cheaper on Amazon US -
The Irish RM and
Mapp and Lucia.
Prime Suspect DVDs are cheaper in UK but the BDs are available only in the US.
US TV shows are almost always a lot cheaper on Amazon. MASH is a notable exception. This is one of the few US shows which has
its own Euro region DVDs. As a result it is a lot cheaper. The DVDs are usually identical. Some bonus material can be different. This
is occasionally not the case for movies. The transfer to BD (sometimes transfer to DVD) can result in changed color or sound. Subtitles can be missing etc.
You can get a lot of cheap British DVDs made in European countries on Amazon UK. There is a huge demand for British mysteries in Europe and complete DVD sets (sometimes complete BD sets)
are available from Spain, Scandinavia and the low countries at greatly reduced prices usually without English subtitles. Sometimes Dutch, Spanish or Danish subtitles cannot be turned
off in these ersatz productions. The shipping cost from Amazon UK is a lot lower than from Amazon Europe (Fr, It, Sp, Ger). DVDs are usually more expensive in Europe than in UK.
Disney titles from Amazon Germany are an exception but the shipping cost eats into the profit you are making.
Right now the British pound exchange rate is very low due to Brexit. Great time to buy British DVDs. Make sure Amazon Currency converter is turned on when you purchase.
I often pay less than the price quoted on Amazon UK website. I think this is because the prices include some local taxes that Amazon UK does not have to pay if they are exporting.
I got 10-17% reduction in 75-80% the DVDs I bought.