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Whilst the picture is not clear enough for easy recognition, I'd say this is what it says on Paula's tin! So I have agreed on the basis of it having little 'eggs' on short stalks - berrylike gas-filled bladders (though receptacles maybe?) on reduced stipes.
See mine now http://www.ispotnature.org/node/712480
Lat/Lng: 50.231, -5.393
OS grid ref: SW581422