With our large mortgage we're always on the look out to save money and we've done pretty well this week.
First off I applied to EDF (an electrical company) to have free insulation fitted as part of a government incentive scheme. I applied a while ago and before they came to inspect I made sure that the loft was completely clear of all the old insulation as it was so full of rubbish and old mice nests that it was doing nothing anyway. Also by having a clear loft it meant they had to fit the full 300mm amount.
In the end they came on Thursday and filled the cavity walls with insulation, 300mm in the loft, insulated the loft hatch and fitted seals and catches, lagged the water tanks, lagged all the pipes and even fitted a chipboard walkway over the joists! All for nothing, I think its to help them off set their carbon footprint but it should save us loads of money in heating.