Unfortunately the brakes on the rear portion failed and it ran back down the gradient to collide with a following train. The goods vehicles were destroyed and the driver and passengers of the following train sustained injuries, but there were no fatalities. A minor accident occurred at the tunnel on 29 October 1855 also involving a train becoming divided and one portion running away. There were no injuries or deaths and it is thought that no investigation was carried out. Four platelayers were killed in the tunnel on 14 April 1896. This is mentioned in Hansard for 27 April 1896 (the report mis-spells "Stroud" as "Strood") but no details are given. On 9 December 2009 a door on an HST came open in the vicinity of the tunnel and a passenger attempted to close it, without success but at some personal risk. A local newspaper attempted to sensationalise the incident by stating that the passenger concerned was "almost thrown from the train" as the door "flew" open. Careful reading of the rest of the article shows that statement to be inaccurate and misleading; in fact nobody was near the door when it opened, and any risk to the passenger concerned arose entirely as a result of his decision to attempt to close it. Local councillor Andrew Gravells is quoted as saying that trains should be fitted with devices to prevent departure from stations if doors are open. This requirement already exists, and older slam-door stock such as the HST was retrofitted with a central door locking system in which a power-operated bolt, activated by the guard, prevents the doors from opening while the train is in motion; however this system is not interlocked with the driving controls. It is not clear how the system failed on this occasion; the RAIB was informed of the incident but no report appears to exist on their website. Disruption to train services was caused on 17 January 2011 when a huntsman and twenty fox-hounds trespassed on the line near the east end of the tunnel. One of the hounds was struck by a train and killed. The train was cancelled and other trains suffered delays. The trespassers had disappeared by the time British Transport Police officers arrived, and no hunt admitted responsibility.