I know Margaret Thatcher was there as I picked up a signed copy of her first book the following week, I also met the Duchess of York there too and she later sent me an inscribed photo in a frame Ethan Hawke was there but someone saved me a signed copy so didn't see him, can't think who else it could have been, my son has just said there wouldn't have been a queue round the block for Margaret Thatcher, plenty of police security though
Last signed book I got was the then Mayor of New York - Guiliani - collected later.