Southmere Park car park just on Bazalgette Way, SE2. As you come off the A2041 you drive down to the mini-roundabout and turn right and a little further is a small car park on the right in front of the lake with space for 8/9 cars Fridays and Saturdays after 7pm is good. Couples in cars that don’t mind you watching from a little distance. Seen a woman in her white car topless and a couple in a silver car at it last week so it’s seems to be known location to locals. Let me know if you visit and see anything.