It occurs to me that there may be a serious problem, when it comes to descending steep hills.
Is there any serious engine braking available?
I have in mind the Devon banks like Countisbury and Porlock hills where there are 1:4 or 1:5 sections, such that with the earlier Jazz cars you would probably change down to 3rd or even 2nd gear + brakes to safely negotiate such slopes.
Countisbury hill is circa 2 miles long and descends around 700 feet and if you are relying on brakes alone, I could well see brake fade developing.
Perhaps someone can explain the procedure for such situations, or is brake fade a thing of the past?