I've seen systems with my own eyes that British Gas have recommended a powerflush on that are pristine. According to the homeowner they didn't even take a water sample. The true cause was the radiators needed balancing and the pump was lazy, hence the cold radiators.
To be fair, powerflushing is widely used as a money spinner for a lot of companies, including those that undercut BG after they have recommended it.
I have worked as a contractor for B.G, and had to attend there little one day training course, in which they made it very clear that they saw themselves as the elite, to the point where I felt patronised, especially considering they were looking to use us/me for their work! This is the attitude that I dislike the most and dare I say it, it does rub off on a lot of the engineers that work for them.
I've no doubt they they are in a position to offer their engineers a great deal with training and all the top quality gear etc, but for that you are expected to actively promote the company and create sales, again this comes straight from the horses mouth.
In effect they have created a kind of franchise arrangement with the engineers, both benefiting each other, which is fine and makes business sense, but when engineers knowingly sell something that is (in my opinion often) un-needed and priced at the higher end of the market it doesn't look good for B.G regardless who's to blame.
This discussion is never going to change the opinions of those that work there, although I have spoken to a lot of ex B.G engineers who do agree with my comments once they are 'released' :devilish: lol
Its business and it all comes down to value for money, or perception of. programmes like rogue traders don't do the small traders much justice and often scare people into paying more for a more trustworthy brand, whether or not they truly get that is open to debate, I certainly have my opinion of it.