From London Stanstead take M11 southbound. Take M25 exit eastbound, signed for Dartford River Crossing. At the river crossing (QE2 Bridge) keep to the left hand lane. At the tolls stay towards the left side, and take the slip road immediately after the tolls.
Leave the M25 at Junction 1a. Follow the slip road to the roundabout. Take the third exit, signposted for Swanscombe. Keep to the left lane, there is filter lane at the next roundabout for a left turn. (See red line above in map above). Follow the road past the Hilton Hotel on your right.
Turn right at the next roundabout onto Anchor Boulevard. Go straight on at the next roundabout.
The entrance to Riverbridge House is about 250 metres on the left, just before the next roundabout.