For the last couple of weeks, I've noticed that a builder living up my road has had a pile of old lead flashing half under a pile of wood in his front garden.
A few days ago, on the way tot he pub, I spotted him sorting out his van and cheekily asked if it was scrap.
Yes it was, and I could take it away. Which I did on the way back.
Result: I reckon about 15kg of lead suitable for weighting model railways and boats. OK, I had to flatten it and clean the muck off with a hose, but it's a small price to pay for a few years supply.