Also the trans pennine services used to be 158s and that was only a year or two ago.
This was frowm may platforms at Pic.
The sprintr family are all very simialar. The only exception is the 159 which is southern region only and the trains are much longer so there is a difference in performance.
The 156 and 158 are almost identical when it comes to size (two car sets of course) and the engines are very similar too.
If driver training in this country is of any good standard then it should be like riding a bike. Forgetting is not an option (although this would explain a lot of late trains) and if such an occurance was to come around then someone is not doing their job properly.
PS: I can't find any record of angel trains owning 143s/144s. Do the train operators won them is is there another hire company?