At the beginning of October (checks image data) in fact on 1st October, I was collared by John Dallas, of Bracken Hall Countryside Centre fame, on Kirkgate in Shipley. As a result of the conversation I got my camera and went along to one of the buildings on Kirkgate.
Apparently there are several places locally where Hops are growing and thanks go to John Dallas for pointing this place out to me where Humulus Lupulus is growing. I was thinking that it is unlikely to be useful for beer but after a quick on-line search I found that you only need between 5 and 15 grams of Hops for each litre of beer depending on how hoppy you want it. Admittedly that will be dry hops, but 5 grams is not much.