I tried to take a photo of
Park Hill Water Tower in Croydon, on Saturday, but couldn't get very close. The park was actually closed, because there was a stag deer in it! This is the best shot I could get, from a footpath adjacent to the park.
I may go back and see if they've got rid of the deer yet, but I'll use a different route, as Water Tower Hill is
at least 1 in 10, albeit for a very short distance. I had to get off and walk, since I simply couldn't turn the pedals on the single speed commuter! That's the only hill that has defeated me on a single speed, other than Ditchling Beacon, which is significantly longer.