Have a celebration drink at Paramount(103 New Oxford Street, WC1; 020 7420 2900; paramount.uk.net), which has 360-degree views of the West End and beyond. Booking is essential, dress smart-casual.
Walk back to Trafalgar Square and join the free 60-minute taster tour at the National Gallery (nationalgallery.org.uk), which houses the superb collection of 600 years of Western European art.
