Not wrong for buying from them, wrong to complain that they won't change their business to account for one trade's supply issues now. That trade (along with others) put the DIY sheds in the prominent position they have now. BG supply to their biggest customers, the DIY sheds are one of those, and it's the trade/s along with public who've put them in that position.
BG are a part of the problem for sure, but like any company or business they can only supply where there is demand. Outside of the huge sites the biggest demand by far in recent years has been the sheds. DO you seriously think that BG (or anyone else) is going to p1ss off one of their biggest customers because people further down the chain are unhappy?
I havent complsaned about who they sell to its not there problem.
The problem is 1 manufacturer hold the whole industry to ransam and impacts every plasterers life every time they have a problem at there plants.
There a F*****g joke but they can be because ultimatley we can do nothing about it.
Merchants, sheds spreads where just all puppets in there little game!