Baby is 12 months old. His nursery drops below 15C at night. He has pretty poor circulation and just doesn't produce much body heat.
He's already dressed in vest, socks, sleep suit and 3.5 tog sleeping bag but he's still waking up every 3p minutes absolutely freezing cold.
I can't have the heating on all night it's too expensive. The room is small so I don't think a heater is a good idea.