Having 'finished' this puzzle, I realised I had one too many clashes, and only on examination did I see that I had not recognised the 'consistent' nature of these. It would have save an inordinate amount of time if I had seen that the clashes were restricted!
This was because one of my first answers was ALIVE to 14 down and this is clearly wrong, though it strikes me as better than the alternatives. Can anyone help me on this?