Sorry about the long Subject line. It seems necessary, nowadays, to say up-front that a topic is trying to inform, not brow-beat.
At (ignore line breaks)
Points to note: (1) they conclude that often one must suit a fuel system to local circumstances; (2) these folk have no special axe to grind -- they want to find the _good_ arrangements.
FWIW Norfolk is the fourth largest English county, with scattered population centres, and the council do a LOT of driving in sundry kinds of vehicles. (Scotland's counties tend to be larger and a bit hillier than England's.)