seen... the Christmas tree in Trafalgar Square lit up. The annual Christmas tree lighting takes place tonight. A 51-year-old tradition, the tree is a gift from the people of Norway to thank the British for their help during the Second World War. Christmas carols will also be sung by the St. Martin's in the Field choir. Trafalgar Square, London, 6:30pm.

been... disgusted at the idea of buying gifts. If "bah humbug" is more your style, head for Books Etc where One Foot in the Grave star Richard Wilson is signing his Christmas book, Scrooge's Guide to Christmas: A Survival Manual for the Festivity Challenged (Hodder & Stoughton, pounds 8.99) Books Etc, 421 Oxford Street, London, 6-7pm. Info: 0171-495 5850.