The Westerleigh goods train was still passing under the bridge at the time of the collision. The engine and eight Wagons were clear of the site when the collision occurred. The locomotive and front 6 wagons were undamaged, but the seventh and eighth were derailed, although they remained attached to the locomotive and upright, being dragged down the line until Honeyfield and Clarke realized what had occurred. The ninth wagon was derailed by the LMS mail locomotive, skidding into the down cutting by the bridge just ahead of the locomotive. The tenth wagon was hurled by the engine off the rails and collided with the down cutting of the bridge, coming to a halt close to the GWR Engine. The eleventh wagon followed the tenth, clipping the mail train's tender which stopped it. The twelfth wagon came loose from the eleventh after colliding with it and being pushed so it was facing opposite to the rails. The thirteenth wagon was derailed and collided with the rear of the twelfth wagon. The fourteenth wagon had been pushed by the LMS mail locomotive's momentum off the Rails, facing parallel to the down Line with minor damage. The fifteenth wagon had clipped the rear right-side of the fourteenth wagon and had derailed to the right of it. The sixteenth wagon was derailed at the front left side and the rear right side. The seventeenth wagon's coupling to the sixteenth broke in the collision and was slightly derailed. The eighteenth wagon had similarly been slightly derailed but was undamaged. The remaining 29 wagons and Callaway's van were undamaged and remained on the rails.