I have replied to Mark's message on Mick's blog with this,
Some of the MCS certified companies that I have had dealings with are installing Solar Thermal and ASHP's with no previous experience of plumbing, they are a detriment to the industry. And to say small companies would be in it for a fast buck is a joke, the like of "fit the best" double glazing companies aren't! I see they can offer 35% discount in the summer sale, well as a small company I'm sure if I was MCS certified and then added 400%
to my £3000- £4000 for solar thermal I could then have a summer sale!!!!!!!!! Oh and yes they do try to charge £18k for a small domestic solar system!!!!!!!!!!!!!