As part of the engineering MSc project, we’re just looking at how to get frequent meter readings in a number of Edinburgh churches. This is the set up for one of them: an old Nikon mounted on a window squeegie. A Raspberry Pi is driving it to take time lapse photos every 10 minutes, but we could have used an old laptop. This won’t work everywhere – it requires good clearance around the meter for safety reasons, as gas and electrics don’t mix – but for some churches it’s a cheap and cheerful option. The student will be using the data to understand thermal comfort and heat loss, but it is also useful for getting a sense of what it costs to run the premises under different circumstances.