Ladbroke Grove rail crash
Another reason was that the Thames Turbo had been fitted with a safety system called ATP (automatic train protection), which would have stopped the train if it failed to stop at a red signal, but it was switched off. The High Speed Train's ATP was also off. Although it was recommended after a rail crash at Clapham Junction many years earlier, it had proved annoying in the past and no company required its trains to have it working and switched on.