Thanks again everyone!
I'm not worried about Noah taking over my bed, it's kingsize and there is just me and him now! If the temperature of the flat was at, say, 15C all night and then a good part of the day would a Flectabed be enough? I rarely use heating in the morning and certainly not if I am on an early/ day shift - there are no timers on the heaters so I am just up and out of the flat. I would not be comfortable leaving a panel heater or my electric blanket on low when I am not here as the thermostat could break, but pet beds are such low voltage/ wattage that they should be safe? Can i use a heated dog bed for a cat?