Thanks Very Much
My Wife's 146 1.6 Boxer decided it wouldn't start 6 miles from home on Sunday.
Came back courtesy of the AA. Looked like an immobiliser problem.
I did a search and got the car going myself with what I found on here.
Saved me potentially digging into the dash to reset the immobiliser control unit.
Resetting the immobiliser by shorting the battery leads and swapping the battery, even though it gave every indication of being OK it wasn't. It was obviously that which upset the immobilier.
Would just like to say thanks for the info.