A collision Attack occurred Coming_to_be derailing the runaway in such a way that it fouled Hindering the main line just as the 16:15 Manchester to Crewe express approached Arriving , drawn Motion by two locomotives , LNWR Waterloo Class 2-4-0 No 418 `` Zygia '' and Experiment Class No 518 `` Express '' .

The locomotive struck Attack the loaded flat car crushing the cab , but without derailing .

The train 's crew was able to halt Process_end the engine quickly , thus preventing Preventing_or_letting the train derailing Self_motion following the blast .

The crash was recorded Recording on a track-side camera which shows all thirteen train cars derailing and four overturning .