Well guys, I've just taken the nearside floor panel out, peeled up one side on the tunnel covering the selectors and could immediately see the middle selector shaft was forward of neutral and the end of the gear stick was in the right hand selector shaft, first gear. I reached in, pushed the selector back, all sorted! I had visions of dropping the gearbox, this is a positive end to the day. As I said, this was caused by trying to pull it into neutral by leaning in, without the clutch. I won't do that again!
Right, floor back down... Cheers for the advice.