Hmm, for the curious, I got the car to start (eventually) by closing/opening the doors five times with the remote, then ignition off-II-off-II-off-II and then click-click-click-click on the remote to re-pair the immobiliser and fob. Overall, not a good sign?
Although I did get it going that way, when I subsequently stopped at services after a wee thrash, it did it again. Second time I stopped, it seems to have stayed 'paired' OK.
Wonky aerial?
e2a: I mean drive, sorry. One doesn't 'thrash' a V40