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Thanks, have put another photo on showing the clumps if that helps.
Yes they help, certainly Trichophorum cespitosum. The first photo is a great image by the way.
I am now completely confused. The image in Blamey, fitter and fitter 2003 looks nothing like this (especially their close-up), it does not appear to be in Fitter and fitter grasses et al (1984) at all(actually it is but called scirpus cespitosus and image similar to the one in blamey). The image in Streeter et al 2009 does look reasonablish. Jermy et al carex book 2007 image is particularly similar but is called northern deergrass and is shown as very rare on the dotmap compared to T. germanicum, description seems to be in favor of T. germanicum in Stace 2010 which also suggests T. cespitosum is very rare.
These plants in the boggy area were rather large and meaty.
Sorry, depends on the taxonomy you use and I knew what I meant but did not communicate it effectively: I mean T. cespitosum in its broad sense. I have amended the identification for you to the aggregate; I cannot tell if it is susbp. germanicum or subsp. cespitosum (as in the drop down list - they can also be treated as species if you like which I now see is further down the drop-down list) from these photos.
Lat/Lng: 54.4863, -6.60411
OS grid ref: NW019198