Well I'll take it to the garage tomorrow morning and ask them to do a full diagnostic on it then. It's just a sticking valve seems to tick the boxes for the problems I had with the cylinder, and since it just unstuck one morning, and then misfiring now instead of just a cylinder not working, it seems to coincide with the whole sticking thing. But I don't know, I'm no mechanic, so we'll see what the mechanics say tomorrow.
Thanks for all the help though, it's given me ideas of what else it could be, and other things to try.
