If you are looking for an amazing city break Europe has many fine choices but none finer than London. Sightseeing in London is probably why they invented digital cameras because everyone kept running out of film before they even got to the Tower of London.
When investigating European city breaks its important to note that in London most of the people almost speak English which makes things like getting to grips with the rich and colourful history or understanding a taxi driver much easier than most city breaks Europe has to offer.