S.Byers wrote:
The extent of the damage in the Berkshire crash was caused by two
major factors apart from the speed of the train and the limited view
of the hero driver.

These we

1/ the rear power car, still under full power, caused much of the
crumpling and jack knifing, and


An emergency brake application causes the power to be cut. Additionally it
is a natural reaction by an experinced driver to cut power as he applies the
brakes. On an HST this is done by pushing both the power and brake handles
forward to their fullest extent.