Mark Kermode could not stop raving about it on his film spot yesterday and I've just seen it.
You can watch it on Sky and NOW tv.
It's really good. Powerful, moving, thought provoking, compelling... the lot.
4 main characters in it and I could not say which was the best acting... they were all really good.
(one was Aunt Lydia from HT, Ann Dowd)
I can recommend it 