I don't rate Heartbeat especially. It's yet one more TV series exploiting the songs of the sixties but for the most part, it Could have been set in any period. It doesn't know what it is either. Is it a police drama? Medical drama? Social drama? Seeing as it's light entertainment, it masters none and doesn't appear to explore serious era-specific issues. You might as well be watching Doc Martin. It does however enjoy high quality actors, decent writing, watchable stories (despite my criticisms), pleasant locations. For something a little more authentic and focused, try All Creatures Great and Small with it's slightly more memorable cast.
Review of Heartbeat
