Draughty window or door? Now it can be seen from space

Infrared satellites made by British company will use thermal imaging to pinpoint heat loss

A flotilla of British-built heat-sensing satellites is to be launched into Earth orbit to pinpoint badly insulated buildings across the planet. Seven thermal-imaging probes are being constructed in Guildford, and these are intended to play a key role in the battle against global heating by showing how homes, offices and cities can be made more energy efficient.

This week, the British space company Satellite Vu will announce that the first of its heat-sensing satellites is to be carried aloft early next year on a Falcon 9 rocket, the launcher operated by Elon Musk's SpaceX company.