We've just come back from a few days in Lincolnshire. One of our visits was to the BBMF visitor centre at RAF Coningsby.
As no bags are allowed inside, my wife left her bag in the boot. I went to lock the car and it wouldn't lock. I tried everything
but it still refused to lock. Eventually I realized what it was. My wife although she doesn't drive, always carries a spare key,
and yes it was in her bag in the boot. ....Quite a clever feature really, as I once shut my key in the boot on a Honda Accord..
Having to wait 3 hrs for the AA to arrive.