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
Lower Thames and Medway Passenger Boat Company Lower Thames and Medway Passenger Boat Company Lower Thames and Medway Passenger Boat Company is a river boat company which provides cruises on the River Thames in Gravesend and London, UK. Bateaux London cruises operate on the Thames under licence from London River Services, part of Transport for London. The company provides cruises on the River Thames. Princess Pocahontas cruises begin at Gravesend and head west past Tilbury Docks, under the Queen Elizabeth II Bridge at Dartford and through the Thames Barrier, calling at Greenwich Pier. Passengers may remain on board for an optional "stay-aboard" cruise along the Thames, which