I had no luck with this, they sent a surveyor round who measured up and made it all sound nice and simple.
A few weeks later the installers arrived, went into bedroom to do first loft (we have 2 seperate lofts) came out 30 seconds later and said "sorry love, can't do that one, the hatch is to small".
They them got into second loft, carried all the rolls of insulation up and came down 5 minutes later saying "we can't do this loft because the beams were not strong enough, look at the cracks we have put in your bedroom ceiling".
They then informed me that the company would have to send out some lighter workmen and someone from the office would phone me within a few days.
Three weeks later I telephoned Warmfront to ask them what was happening, they informed me that I had cancelled installation, as the computer clearly said 'Customer cancellation'.
Obviously I told them this was rubbish, but the long and short of it was they told me they wouldn't be doing any of the work and the damage to my ceilings were my responsibility. Goodness knows why they send surveyors around.
I really hope everyone else who goes for this, has much better luck than me.