Comment by tialaramex

Good idea on "leaded".

> also exempt military vehicles, but I'd be surprised if there was any remaining use of leaded petrol in the UK military.

Modern tanks are diesels yeah. However the UK has a lot of enthusiasts who own (obsolete and of course also de-fanged) tanks. And I can totally believe some of the archaic designs used leaded petrol. On the other hand, even a brand new production tank is very thirsty so realistically if you aren't trying to do a "Brewster's Millions" you would not actually drive your tank very far.