The best way to get in touch with good old english tradition is to stay at The Ritz downtown London. Their afternoon tea is famous! Opened by renowned hotelier Cesar Ritz in 1906, The Ritz still today retains all the excitement and glamour synonymous with this legendary hotel. The 133 guestrooms combine Louis XV1 style interiors and sort of feels like your at grandmas house.
If you are planning to experience the afternoon tea (which I highly recommend) make sure to make reservations way in advance!