The fact remains James you have 18 people onboard a van which is underpowered when its empty!
Its restricted to 60 for a damn good reason, so do 60!
Don't attempt any over taking on a single carriageway, think and plan ahead.
By your definition James all trucks (UK plated and purchased in the UK) at least are Dangerous because they are limited? They don't have the 'power' to get out of the way?
You do NOT need power to get out of a situation, that's just the fools answer.
A transit with 130bhp, with 18 people on board is going to have NO power what so ever! You think at 60 you slam it in 3rd and put your foot down its going to roar off like a V6? 'dangle berries', it won't go anyware, belive me i tried, it will make a hell of a lot of noise, but your forward velocity will not increase!
Fact remains if you have 18 people on board, and smash into something doing 80mph, you will probably all be dead. You won't have the time to react, the van won't be able do anything cause it will be too heavy and won't brake or turn!