I just bought one of these boards from B & Q and needed some extra parts , so drove around to Screw fix, electrical parts, and was asked for id to show that I was a sparks, then I had to sign up and give them my JIB card and tell them the location and ruff date of test, this was done over the phone with not sure who, then I could purchase the parts I wanted CRIMPS, LOL, I was looking at a magazine and noticed the same DB for £10 squid more I pointed out to the worker that B&Q are selling them for £10 squid less, they then went on to say that B&Q owned Screw fix and was going to call head office about this, as they were both local to each other, not sure why B&Q can sell direct and screw fix cant, but I was impressed with the screwfix way, no id no parts, plus you get the parts cheaper,LOL.