Interesting parallel between reality and 'Last Orders'

I was listening to the BBC's 20 Dec 2009 edition of Desert Island Discs, with Sir Michael Caine, when he told the story of his mother, and the half-brother he never knew he had. The brother suffered from epilepsy when young, and many years ago was in an institution when he suffered a fit(in a room with "stone floors"). During the fit, he caused brain damage to himself, and like Helen Mirren's Amy in "Last Orders", Caine's mother visited him weekly until her death in 1989, when Sir Michael was told of his half-brother's existence. Caine's mother never let anything be known of this half-brother, because she worried that it might damage Sir Michael's career if the truth was known.