I was struck by a terrible chill yesterday morning.  The heating hadn't come on. Hubby feels the cold badly so it was an emergency. Thermostat had clicked so it wasn't that.  Timer was blank, no time, no lights. Aaargh.
The airing cupboard was cold.  Double aaarrrggghhhhh.  But then, out of the cold and chilly blue a bright idea.  YES!  The ironing board had fallen against the isolation switch and knocked it off.  Click, lights, pump action, gurgling of pipes.  Thank you Lord.