I'm sorry to say that all Cockney Steve says is true. Danny notes that the Republic of Ireland ran a similar scheme, but their dye was (not surprisingly) green. The story was that, if you mixed it with the red stuff North of the border in the correct proportion, the colour would vanish and you were home and dry.
Not quite, but both products can be laundered by various processes involving acid and fuller's earth etc. The result is very dodgy diesel which wrecks fuel injection systems and tons of dangerous sludge dumped in country areas. Large quantities are illegally exported, if you tank up diesel at very low prices expect a huge engine bill!
To return to thread, my father recalled an MU where Lancasters were delivered from the factory, test flown, snags remedied, then taxied round the airfield, gear up with engines idling, and cut up for scrap. Apparently the contract had to be completed ...
Three hapless airmen took the avgas tank drainings for their own motorbikes and ancient cars. The slow-burning avgas burned the exhaust valves, and Their Airships had them court-martialled for taking Her Majesty's avgas. They should have allowed it to drain from the edge of the dispersal and pollute the surrounding area, this being the approved procedure.