Summary: I really enjoyed this - the casting is brilliant with Penelope Wilton, Sarah Smart, Rory Kinnear all great - though Janet McTeer steals the show as the wise-carcking 40 something sargeant who's seen it all before.
A few quibbles - the reason for the title is a bit misleading, as it actually takes place on 5 days over 12 weeks - also, the ending seems a bit contrived and very rushed - 4 x 50 minute episodes then rushed conclusion in last 5 mins of episode leaving you realing with no explanation