The station was Rickmansworth, taken from a slightly different angle to Tangy's
picture in Photo Quiz 13.14 not so long ago.
Those who guessed right:
tubeguru
jbom
palkanetoijala31
Edgemaster
Those who didn't:
Starkey7 (Finchley Central)
I thought that taking a picture of a station traditionally passed through when dark might throw some people off.
Holder of the slowest recorded 274 attempt: 4 months, 1 day, 9 hours, 17 minutes, 32 seconds.