London St Pancras International station The chunnel services once operated from Waterloo, however in 2009 St Pancras International was opened and all services were relocated. see: http://stpancras-international.co.uk London Stratford International station Stratford International will open after the Olympics 2012.
The word 'chunnel' hasn't been used for twenty years. It was a word manufactured by the media and a combination of channel and tunnel. The Eurostar station in London is St. Pancras International on Euston Road NW1.
Most easy way is of course the Eurostar highspeed train. Leaving several times a day from St. Pancras station in the center of London, going under the Chunnel and arriving only 1h55 later totally relaxed in Brussels Midi station, in the center of Brussels.
The route that Eurostar trains ride through the Chunnel is the route that travels from London to Paris and from Paris to London. The train travels at over 400km/h.
Take the train to Brussels and connect with the Chunnel train.
Calais is the closest big city from the Channel tunnel.
The Channel Tunnel is a rail tunnel and trains run between London and Paris or Brussels. There are some other stations that you could join the train at, but if you are a visitor to the UK, you would be best to join the train in London at St Pancras Station.
It is 678 miles or 1,091 km not counting the ferry or chunnel.
AVIS has offices at London Waterloo, Ashford International, Lille Europe and Paris Gare du Nord. I don't think any other company has all four, but you can certainly drop off an Avis car at any Eurostar station.
London Paddington station was created in 1854.
London St Pancras International Station.
London Bridge station was created in 1836.
Richmond station - London - was created in 1846.