I've met the following;
Politicians: Tony Blair, Sir John Osborne, Baroness Cox, Baroness Scott
Show business: Cliff Richard, Fish (ex Marillion), George Hamilton IV, Marti Caine, Martin Kelner
Film director: Ken Loach
Playwright: Dave Sheasby
Poet: Ted Hughes
Sport: Michael Vaughan (Cricket), David Lloyd (Cricket), Ken Barrington (Cricket), Gordon Banks (football), Jack Charlton (Football), Lawrie McMenemy (Football), Howard Wilkinson (Football), Seb Coe (Athletics), John Sherwood (athletics).
Those are just the ones I remember at the moment. (There will be loads more). There are other people who I've simply seen. e.g. Kylie Minogue was a passenger at the rail station I worked at, I've sat next to Paul Heiney on a train and Ian Lavender had beaten me in a race to get a cab on more than one occasion. Oh . . . and Delia Smith shops in our local Tesco!
Chris