Changes

Get the Underground to London Bridge Station ''(Northern Line - Jubilee Line)'' and get the overland train to a station called Mottingham ''(direction Dartford)'' - this is very close to the entrance to the M20 to Dover - head for 'Great Sidcup Road' around 800 yards further down the road is a set of traffic lights (corner of 'Sidcup Road' and 'Court Road'), and you can hold a sign saying Dover from that crossroad and try to get the cars stopped at the lights to let you jump in. You can also stand by 'Sidcup Road' at the Shell petrol station entrance. Remember that the Shell petrol station is the only place that a car can pull aside before the motorway, it is therefore flaw to try to walk further down 'Sidcup Road'.

If you arrive in Mottingham you just need to go on the other side of the tracks, go out of the The petrol station and you go which used to your right just 100m be at this junction is now closed (June 2010); it remains to a main roadbe seen whether they will reopen it. There is petrol station with a lot of local trafficstill just enough space to stop, but if you ask obviously it won't be as good as before. Might be worth making a sign for a lift to the next McDonalds on that road, where another petrol station is as wellsay, Maidstone Services and then getting on from there if you have good chance are heading to travel onDover. (I haven't tried this)

If you arrive in Mottingham you just need to go on the other side of the tracks, go out of the station and you go to your right just 100m to a main road.  The train to Mottingham (zone 4) departs from Charing Cross Station (downtown zone 1) through Waterloo East (zone 1), London Bridge (zone 1), New Cross (zone 2) and Lewisham (zone 2) stations on its way to Dartford and Gillingham. Mottingham Station (as well as the previous station of Lee in zone 3) does not have a check-in/now has Oyster Card 'check-out gate, which means that it is better not to ' so you can use a Oyster Card when going to that station as this if you won't have the chance to 'touch out' and be charged consequently. Therefore, it is also possible to simply buy a ticket to the previous station in zone 3 (Hither Green or Lee) and bring the cost of the ticket beneath the 3 pounds. The distance between each stations is no longer than 5 minutesone.