Swanley provides fast train services to Victoria, but also to London Bridge, so although Cycle Orbital has now been routed further east to avoid dull and busy roads near the M25/M20 intersection, this twin link could be useful. Swanley is at 1.9 on the route.
For Cycle Orbital anticlockwise, take Station Approach and London Road to 1 Beachenlea Lane, then a further mile to Swanley village and Arc 4. The clockwise route to Eynsford is longer; 3.4 miles via Crockenhill village, including a small diversion via a bridleway 2.3 and Stones Cross Road to avoid the B258. You meet Arc 4 as it enters Eynesford.