River Thames Thames Estuary), the river is subject to tidal activity from the North Sea. Before the lock was installed, the river was tidal as far as Staines, about upstream. London, capital of Roman Britain, was established on two hills, now known as Cornhill and Ludgate Hill. These provided a firm base for a trading centre at the lowest possible point on the Thames. A river crossing was built at the site of London Bridge. London Bridge is now used as the basis for published tide tables giving the times of high tide. High tide reaches Putney about 30 minutes later than
Queen Elizabeth II Cup to commemorate a visit to Hong Kong by Queen Elizabeth II and the Duke of Edinburgh, Prince Philip. It evolved to an international event in 1995, with Hong Kong horses competing against those from the United Arab Emirates, the United Kingdom, France, Japan and Australia. Since becoming a Group One race in 2001, every winner of the Audemars Piguet Queen Elizabeth II Cup has been a descendant of Northern Dancer. The 2006 race saw Irridescence upset the great filly and European Horse of the Year, Ouija Board. The Queen Elizabeth II Cup has been sponsored by the Swiss haute horlogerie