Growing on a low garden wall
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Not so certain this is Tortula muralis. It lacks the white hairs on the end of the leaves - see the photo posted by yorkshirekev on 23rd February 2010, which I'm sure is T. muralis. What it could be instead, I've no idea!
Thanks, TimP, The other observation is at http://www.ispot.org.uk/node/20611 and I see what you mean about the hairs, but in other respects my moss looks like T. muralis, so I assume that the difference may be due in part to natural variation and in part to conditions & photos. I'm new to mosses, so will wait to see what others say.
University of Edinburgh and Biodiversity Observatory (OU)
The RH photo has much of the jizz of T.muralis but if the LH photo is a closeup of the same plants its not that species. In T.muralis the leaf has a blunt rounded tip with a very prominent white hairpoint. The leaves here are sharply pointed (not the same as a hair point).
It COULD be Ceratodon purpureus (red flushing of lower seta of young sporophytes) but definite id would be reckless
Yes the LH photo is the same plant. I will take another look at this one as well.
Lat/Lng: 52.0, -0.7
OS grid ref: SP8936