On unlocking parked car suspicion immediately aroused by wing mirrors flashing but not folding out. Switched on ignition and dash lit up like an Xmas tree with bells and Engine Fault etc. No starter. Again.
Last time this happened, breakdown service told me the immobilizer had locked out. He solved it by simply disconnecting the battery for 30 secs and reconnecting it (to my horror, without following the recommended reach through open window, turn on side lights etc. procedure). All warnings gone and started fine.
So rather than wait 2 hours for a call-out, I simply tried the same technique - and it worked

I won't ask why it throws out Engine Fault when it is an immobilizer problem - life is too short. But does anyone know what causes this immobilizer problem? The mechanic suggested it might need a software update, but given the above simple work-around I'm not inclined to throw cash at the local dealership.
Hope the above may help anyone encountering the same annoyance.