Thomas' derailment in Thomas gets Bumped was based on a real accident. On June 5th 1950, LNER A1 class No. 60153 was hauling a Newcastle-King's Cross express when she was derailed at Tollerton due to track that had distorted in the summer heat. Thankfully, no one was killed, but nine passengers and 60153's driver and fireman were injured, though they all made full recoveries. Thomas' mishap was rather less severe, as he remained upright, but the root cause was exactly the same. I used to think that track distorting due to heat would be impossible in the British climate, but it turns out that it did actually happen.











