house electrics

if you plugged in 2 plugs of heavy appliances of 2kw each (say a tumble dryer on full heat, and a 2kw Fan heater) into a double socket wall outlet 2x2kw @240vac = over 16amps - yet a 13amp twin socket outlet is designed to plug in 2x 13a plugs , how is that? there would be a tremendous amount of...

During renovations to my daughters house we want to renew the light switches however we have a 2 gang switch that is different to all the others in house and it uses 4 terminals on each switch. I can only find switches with 3 terminals at B&q tool station and screwfix. Can someone give me a...