Even professional, paid carers aren't always models of saintly behaviour - and they know they can knock off at the end of their shift to go home, take an uninterrupted shower, and have a normal conversation with someone.

There is something very easy about women's friendships that you don't see as often with men. We all know examples of this, when women will just call each other up or drop a line, not with anything specific to say.

With Alzheimer's, recent memory is affected first. At the start, you count the memory loss in days, then hours - then in minutes. But there's also an insidious backward creep of deterioration.

I was fascinated by the culture clash between England and America in the 1950s. My first memories are of being a girl in those post-war years when things were really pretty grim. It wasn't like that in America, which was real boom time.