After returning to Cumbria and then getting a lift back up to Edinburgh, I turned Milo's viv back on (she'd holidayed with us) to find that the wiring had all corroded.  Unfortunately it also blew the thermostat and the ceramic heat bulb.  Local reptile shop didn't stock what I needed so we had a mad dash to pets at home.  They sold me the wrong thing in a box but we had to just make do. Infrared heat lamp, her old heat mat from when she was tiny and a space heater in the room were just going to have to do for the night.