This is an essential tour of London where you will be pointed out many famous icons of London, including Big Ben and the Parliament buildings, Whitehall, Downing Street., the London home of the Prime Minister, and Trafalgar Square where looking up you will see Nelson on his column as well as Buckingham Palace., the London residence of her Majesty the Queen. 
I can also include a visit to Westminster Abbey. Here, you see impressive monuments to kings, queens, famous scientists, musicians, poets and the Unknown Warrior. At the heart of the Abbey, you will see the Coronation Chair on which our kings and queens have been crowned since 1066, and where many state weddings and funerals have taken place. Or we can see other parts of London as well depending on how much time you've got.
NOTE: All my tours are available in English and Russian.