"I've bought these bladed in the past from Screwfix, and they have been OK. However, the two I bought last are useless. They pull hard to one side, and cause the cut to be a curve. The problem is definitely with the blades and not the frame of the saw, because if I reverse the blade it pulls hard in the other direction. Blades I've bought from another supplier are fine."
"I don't normally bother to review products but these blades were so poor that I felt obliged to make a comment. I would recommend spending a pound or two more and buy a good one. This will save you lots of frustration."