ARW was thinking very hard :
Twin 6ft T8, is that not supposed to be 140W?
Hairdrier, takes longer to dry your hair?
Vacuum cleaner, more runs to get the cat hairs up:-)
Microwave? Well that like a quicky in the pub toilets, all done in 3 minutes
and everything is hot and steamy.
Infra red patio heater, put a jumper on
Fridge, no one is sure about that but mine works OK on 253V
Dishwasher, surely most of the energy is in heating the water so FA saving

I don't think anyone has mentioned, that lowering the
voltage/increasing the current, will produce more waste heat in the
internal wiring of the building. It will not be much extra waste heat,
but...