Thanks to all those who helped me with this puzzle.
I had a misplaced letter in 40 across so 32 down is now clear.
The answer on 65 across is also now clear but, given the obscurity, I wish Maskarade had indicated 'near the M6' or something similar.
The last one that is puzzling me is 21 down. 'Artificial fishing flies recently stolen' (9)
Is the answer a place in Cumbria beginning with U? If so can anyone help me parse it?
Again my thanks to the (long list) of those willing to assist.