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 Silver Jubilee Medal Queen Elizabeth II Silver Jubilee Medal The Queen Elizabeth II Silver Jubilee Medal () was a commemorative medal created in 1977 to mark the twenty-fifth anniversary of Elizabeth II's accession in the United Kingdom, Canada, Australia, and New Zealand. The medal was physically identical in all realms where it was awarded, save for Canada, where it contained unique elements. As an internationally distributed award, the Queen Elizabeth II Silver Jubilee Medal holds a different place in each country's order of precedence for honours. The Queen Elizabeth II Silver Jubilee Medal was created by a Royal Warrant from the Queen. Until