At the moment I've got some insulation in my loft. Within the next two months, I pledge to install or top up my loft insulation by as much as recommended (270mm).
So this is actually happening right now, but it's such a nightmare of a job we were going to give up. I think the handyman has just quit his job because it's such a disaster zone up there. But we must persevere, with the loft as with the run...! :)
If done for two months, this action will save 330kg of CO2