The accident was investigated by Captain Tyler of the Railway Inspectorate; there was also a coroner's inquest on those who had died in the crash. Tyler showed by experiment that when a string of carriages matching the runaway train section was allowed to run back down the incline for quarter of a mile before the brake was applied, application of the brake then brought the carriages to rest well before the site of the collision. Furthermore, he considered that the severity of damage showed that no braking at all had been applied to the runaway. The brakescrew on the runaway brake van had been bent in the collision, and the nut was at the bottom of the working section of the screw, indicating that the brake had been off at the time of collision. Tyler therefore rejected Cooke's evidence that he had applied the brake as the train was arriving at Round Oak; the coupling had failed when he released the brake, but he had reapplied the brake on becoming aware of the breakaway; this had initially had some effect, but the runaway had then skidded down the incline with gathering speed. Instead, Tyler thought, Cooke had left the brake van as it arrived at Round Oak, without applying the brake, an obviously necessary precaution against a 'rebound of the buffers' (a shock loading on couplings as coaches hit and bounced back from the coach ahead): consequently a screw coupling had failed (the failed coupling had a grossly defective weld, as did many of the couplings examined on other coaches in the train) and the side chains had in their turn been unable to resist the shock loading. Cooke, thought Tyler, had been unable to regain the brakevan as the portion of the train to the rear of the failed coupling ran away but had either travelled down on the runaway or run after it sufficiently fast to reach the collision site soon after the collision. A very few words will suffice for summing up, in conclusion, the causes of this accident. A man was selected by the company for the important duty of head guard to a heavy train who proved to be anything but trustworthy and careful, and who, in not performing that duty with the attention that it required, caused the fracture of a defective coupling, and permitted the greater part of his train to run backwards down a steep gradient, on which it came into violent collision with a following train. Tyler had not restricted his criticism to Cooke. The best insurance against failure of couplings was the selection of
intelligent men of known character and steadiness for the execution of responsible duties. Cooke had worked for the company as a goods guard for eight years, and had acted as a guard on excursion trains over several summers. It cannot for a moment be supposed that a man habitually trustworthy should on this occasion only have so far forgotten himself as to invite the passengers into his van, to smoke and drink with them, to employ them at his brake handle, and four times to fracture the couplings in one day by his carelessness; and if the company or their officers were not aware of his character previously, then it can only be said that they ought to have been aware of it, and that they ought to have used an amount of circumspection that would have prevented them from appointing a careless man, as he proves clearly to have been, to such important duties For a train of 28 carriages, two brake vans were inadequate, more than 28 carriages were needed to hold a thousand pleasure-seeking excursionists without over-crowding, and to maintain good order in a thousand pleasure-seeking excursionists more was needed than two guards (who had their normal duties to perform). The accident would not have been avoided or mitigated by specifying a longer interval between trains, or by a greater use of the telegraph. Tyler also noted two points which, whilst having no bearing on the accident, were, he felt, indicative of 'a want of proper discipline in the administration of the company' • the stipulation that the excursion was restricted to schoolchildren and their teachers had been systematically ignored • the record-book at Round Oak station (which recorded the time of arrival and departure of trains - thereby recording whether the interval system was being correctly worked to) had been filled up some three weeks before the accident, and no replacement had yet been procured; for the three weeks before the accident no record had been kept. ==Trial of the guard==