Bordering South Yorkshire is the Hope Valley Climate Action group.  To encourage interest in home insulation measures HVCA obtained a thermal imaging camera (TIC) that shows heat loss from properties through the use of infra-red imaging.  They offer this service to local residents for free – but invite donations if the service is valued.  The survey is offered on an informal ‘good neighbourly help’ basis, not as a professional service. 

Friends of the Earth, Sheffield [admin@sheffieldfoe.co.uk] now also have a Thermal Imaging Camera, and training materials are available online.  Could your community group borrow the FoE camera for a week or two and offer something similar?