Thanks one and all - it's like an Oscars acceptance speech, I'm scared someone will be overlooked.
ChrisE, I'm afraid I can't spend too long on whilst/while, I'm too busy working on a plan to get rid of the dreaded 'travelator'. What a horrible word! It's like something from The Jetsons, a TV cartoon for children. I think we'll all have to do our bit to repel it. There's absolutely nothing wrong with the normal, everyday word - I refer of course to 'the moving thingy'.
Jigjag, thanks for your kind words. You may come to regret inviting my moans and observations.
I am not keen on 'comedienne', which Chambers defines as a 'female comic entertainer'. I think 'comedian' is a much more versatile word, describing a person who acts in or writes comedies, an entertainer who tells jokes etc or an entertaining and amusing person.