If you're a fan of live theater, catch a play at Shaftesbury Theatre. Look online for prices and times.
This London City Centre arts and culture attraction is a good place to begin your day of sightseeing. There's lots to do and see in the area, such as Buckingham Palace, Big Ben, and Trafalgar Square. Wander around at your leisure at Shaftesbury Theatre before hitting up these other fine attractions.