On a wall rather than a hedgerow, but there is no option for walls.
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Those are interesting suggestions. This moss grew in bigger, rounder and greener cushions than I would expect from T. muralis, and I found some (what I thought to be) more likely T. muralis elswhere with some useful capsules. I think it fits S. intermedia better; the leaf descriptions match well. But perhaps it was just in an excellent position. And I am not a moss expert. I have added my T. muralis here: http://www.ispot.org.uk/node/314672
With all this extra info I am also inclined to think it is Syntrichia intermedia now. Good job! Excellent example of how ispot can work so well. :)
Lat/Lng: 51.32777, 0.17484166666667
OS grid ref: TQ516609