19/04/2012 Edit : thanks to Andrew Cunningham, virtually all of the queries posted here are resolved.
Despite being a bit better than I used to be, the rest of these
This coastal plant had me puzzled as well - lots of it growing at Northam Burrows.
And for good measure, these very distinct looking mosses should be identifiable to someone who knows what they are doing! One on a stone wall at Guineaford and one from Northam Burrows.
A Syntricha sp.?
Sand-hill Screw-moss [Syntrichia ruralis ruraliformis]
Wasn't sure about this thing growing on top of an Ilfracombe stone wall though, but it's actually a clump of Thrift - didn't recognise it without the flowers.