Watching the Iron Lady was a deeply unsettling experience on several levels. Although I never met Margaret Thatcher, she has been a significant motif in my adult life. There were several decades where it seemed I could hardly turn on the radio or TV without hearing her referenced in some way. Which made seeing Meryl Streep’s uncanny portrayal of her in the Iron Lady feel quite personal somehow. In my own case, this was all the more true because the film centres on the late PM’s descent into Alzheimer’s – a disease which, unlike Maggie, I have unfortunately met, and more than once now.