section_path: Transport/Port and river boats
section_name: Port and river boats
paragraph_text: Port and river boats
  
  The Port of London, once the largest in the world, is now only the second-largest in the United Kingdom, handling 45 million tonnes of cargo each year as of 2009. Most of this cargo passes through the Port of Tilbury, outside the boundary of Greater London.
  
  London has river boat services on the Thames known as Thames Clippers, which offer both commuter and tourist boat services. At major piers including Canary Wharf, London Bridge City, Battersea Power Station and London Eye (Waterloo), services depart at least every 20 minutes during commuter times. The Woolwich Ferry, with 2.5 million passengers every year, is a frequent service linking the North and South Circular Roads.