I watched "Mum" on a whim and I was hooked from the opening credits (the "Cup" song is both catchy and apt for this series - you'll see why),
I'm familiar with both lead actors Peter Mullan and Lesley Manville and they bring heavyweight class ability to the rolls of divorcée and widow respectively. Now add in some younger talent, great writing, direction and production values and you know you're in the for a treat. While "Mum" is often dry and wryly observed, it's equally laugh-out-loud funny.
TL;DR version (there are lots of long reviews) if you like beautifully-observed, family dynamic comedy of the type only the Brits are good at, this is a a delight. With a colourful cast of larger-than-life oddballs, Manville and Mullan lead us through a year in the life of the world's most tolerant widow.
Just be thankful you're not there and please, do make your tea in a pot!