In lieu of doing anything worthwhile, which I am incapable of, here's a list of famous peole I've seen 'off duty'...not counting the ones I used to see all the time in my slavejob.
Anita Brookner (Twice. She has a giant head)
Richard Burton (He had a giant, head, too, walnut-like)
Tom Baker (Twice)
Felicity ...Uh, GOOD LIFE (Wrinkly, very)
George Melly (Nearly ran me over)
Tom Conti (Ditto)
Gryff Rhys Jones