Clacket Lane Services north
Possibly the best place to get lifts on the M25. There is a bridge here to cross from one side to the other, which can be useful to know if, for example, you are trying to hitch from the M4 to Brighton but get a lift with someone who is going to Dover.
To get to Clacket Lane Service Station from London get a train to Bromley (you can use an Oyster card: http://www.tfl.gov.uk/tickets/14836.aspx), then bus 246 (timetable here: http://www.londonbusroutes.net/times/246Sum.htm)
Ask the driver to tell you when you get to Pilgrims Lane, then walk down Pilgrims Lane and Pilgrims Way to Clacket Lane Services. You can see where you're going on a map here: http://www.motorwayservices.info/clacket_lane_services_m25/googlemap Where it says "Clacket Wood" is the service station. There is also a street view of this area on google maps.
Clacket Lane is an excellent place to hitch to Brighton (Westbound) or Dover (Eastbound) and also fairly good for most other directions as it's a busy station.
To get from one side to the other walk down the country lane to the back of the station until you get to the bridge and cross to the other side (couple of km)
Clacket Lane has alot of European truck drivers passing through it on their return journey to Dover so it is easy to travel down the M20 corridor or even on to the M2.
The best place to thumb for lifts is right out near the entrance to the motorway. This is where the truck fuel station along with car fuel station is located and there is a nice big kurbed verge to protect you. All traffic, even those that didnt re-fuel, have to pass this point.
West towards London Gatwick/London/Leatherhead
Places to avoid
Accommodation and Sleep
Other useful info
--Brackers 17:41, 11 July 2012 (CEST) - Quite a high traffic place to hitch from. I was heading for Canterbury so held a 'M20 E' sign and was tooted by a trucker sitting in the fuel station. Flashed him my sign and he waved me over. Wait time 15 minutes. 05/08/11