London is the biggest city in Britain. It also has the largest population. After London, Birmingham is the second largest city, with around four million people living and working there. There are a lot of small cities such as Oxford and Cambridge. They are beautiful and they have two of the oldest universities in the world. Cambridge is the nearest to London. The most expensive city is London but it’s also the most interesting. London is on the River Thames, and has the most popular places for sightseeing, such as Big Ben, Buckingham Palace and Tower Bridge.