Miller Pattison - Are Government Grants legitimate? YES!!! [Loft Insulation - I don't know about cavity insulation]. Brighton area. If you are over 70 or collecting certain benefits and you currently have less than 60mm of insulation in your loft Miller Pattison will install an extra 200mm for free. My mum is 72 and Miller Patitison just installed loft insulation for FREE!!! Cold call sign-up but afterwards Miller Pattison communication and installation was all A1. The installers [from Salisbury] arrived when expected and were very nice and extremely helpful. Insulation was all installed about 1.5 months after sign-up. Obviously you need to empty stuff from the loft before MP can install insulation but this is only to be expected. Overall my experience of Miller Pattison and of the Government grant scheme for free loft insulation was very good.