I am really wondering about whether WC may have partaken in dogging, and that is why he detoured to Clapham. And knows these deserted/wooded areas in Ashford.
A search for popular dogging spots in Kent according to MSM
The places to avoid in Kent after dark - unless you're into dogging
3 spots named in Ashford - all of which are a very short distance to the Leisure Centre/police searches, and 2 are woodlands....
And Clapham Common is named here for top South London dogging spots. The only one close to his work and on the way back home, which may explain why he detoured 30 mins to Clapham to head back home.
The 31 notorious South London dogging sites which come alive after dark
It would also explain an indecent exposure charge, as dogging/cottaging are not illegal per se but the charge of indecent exposure is often used in these cases. Wonder if there have been witnesses (other doggers/cottagers) who have come forward about him.
JMO