Final few bits of plasterboard to dot and dab into place on the walls. Did so, left overnight and have just skimmed the ceiling, so its all tied together. Just looked at the bag of board adhesive I used, to see the magic words "Board Finish". Hmm, lovely. Simple solution I suppose, drill a few 2" holes and squirt foam adhesive in there. Luckily the metal angle beads I stuck up with it are holding firm! Just thought you'd enjoy my tale of woe!!