Tangmere, the loco hauling the excursion train
The report continued “Services by West Coast Railways have been suspended following the incident on March 7 in which a train failed to stop at a signal … According to reports, a 100mph collision between a steam excursion and a First Great Western high speed train was missed by barely a minute”. Apart from getting the speeds all wrong, and missing just how potentially serious the incident was, it’s not a bad first attempt.
Track layout at Wootton Bassett junction ((c) RAIB)
In other words, blocking any movement to and from the South Wales lines (see diagram). Had a train been signalled on those lines at the time the Signal Passed At Danger, or SPAD incident took place, you do not need any prompting to be able to figure out what would have happened. So how could a train have overshot a red signal on a line equipped with the Train Protection and Warning System (TPWS), which should have prevented it?