If you left the Friday before last, Lucy, this will be too late for you; but, if anyone else is interested;
Walk South down Charing Cross Road from Tottenham Court Road. After about 300 yards, you will reach the crossing with Shaftesbury Avenue. Immediately before the crossing on the left (East) side is a bar called All Bar One. Until a few years ago, it was a record shop. On the Western wall of the exterior are some lamps; and, beneath one of these, is a plaque which reads:
"84 Charing Cross Road. The booksellers, Marks & Co., were on this site which became world-renowned through the book by Helene Hanff."
Ignore the Pizza Hut, which is on the opposite (S.E.) side of Shaftesbury Avenue. It might be worth taking a glance to your right (West) across Cambridge Circus to the Palace Theatre. Until a year or so ago, the theatre there had been staging Les Miserables for well over a decade. At the moment, it is showing Whistle Down the Wind by the revolting Lloyd Webber, but this is shortly to be replaced with Spamalot!