I agree with others. It was excellent and a brilliant performance from Glenda Jackson. It reminded me of an occasion a few years ago involving my husband's aunt who had dementia.
The aunt, who lived opposite his mother (aunt's sister), phoned us one evening a few years ago to say that his mother had collapsed and been taken to hospital. They'd both have been in their 80s at the time. We live 2.5 hours away. We phoned the hospital who had no record of her, phoned his mother, who didn't answer, and then phoned back the aunt. She was very sure about the collapse and the hospital so we asked her to go over the road to check.
We phoned her back 5 minutes later, and she couldn't remember why we were phoning and couldn't remember whether she'd been over the road or not, but she was adamant that her sister had been taken to hospital. We phoned the hospital again (only one in the area) who said no. We asked the aunt to go over the road again and said we'd phone her there. Aunt kept saying 'but she's in the hospital' and was very upset when we kept asking if she was sure.
We eventually phoned the hospital again and asked to be put through directly to A&E. They said that his mother had been brought in a few hours previously. She'd been transferred to a ward and clearly no one had yet entered her details on the computer.
I was furious with the hospital and felt so awful about not having trusted his aunt. I can only imagine how frustrated she must have been, telling us the truth and not being believed.