I or no one on this site are saying plumbers ect a perfect,far from it,and the things Bg do are done by others,that is not the argument
The point is BG should be above this and should be an industry standard and they are far from it
Some things I have seen BG do , as regards selling unneeded works would make the worst gasp
I know you may feel attack is the bast form of defence however do not forget you are trying to argue your case against other engineers, not customers,we have seen BG in action,we have repaired their work correctly when they have power flushed and same fault remains,when they have long gone with their get out clause that they use saying 'you have to pay' but may not work