Are you all talking trade or domestic here? Smoky regularly goes to our local tip through the weighbridge, and I have never been queried about whats on board, except for assy, tyres, fridges, and electricals, which I can dump for a surcharge. Mind you it's over a hundred quid a tonne now.
I sort of can understand them being a bit squeaky about domestic refuse tipping, before they clamped down here it was obvious that lots of builders were claiming to be "just having a clearout at home"..........oh yeah?
They did let people salvage stuff until about 10 years ago, but I think H&S put an end to that

Desperate