ie ▁wheel sets ▁had ▁been ▁sw apped ▁round . ▁The ▁enqu iry ▁concluded ▁that ▁the ▁der ail ment ▁was ▁caused ▁by ▁an ▁excess ively ▁tight ▁bog ie ▁ax le box . ▁The ▁approximate ▁location ▁of ▁the ▁collision ▁was ▁, ▁less ▁than ▁a ▁mile ▁south - east ▁of ▁the ▁ 1 9 1 5 ▁der ail ment ▁and ▁close ▁to ▁the ▁signal - box ▁at ▁Hey ford ▁south ▁of ▁St owe ▁Hill ▁tunnel ▁where ▁the ▁occup ants ▁were ▁able ▁to ▁see ▁the ▁accident . ▁ ▁References ▁ ▁External ▁links ▁Ministry ▁of ▁Transport ▁Official ▁Report ▁into ▁ 1 9 1 5 ▁accident ▁Ministry ▁of ▁Transport ▁Official ▁Report ▁into ▁ 1 9 5 1 ▁accident ▁Pat he ▁news re el ▁of ▁ 1 9 5 1 ▁accident ▁ ▁Category : R ail way ▁acc idents ▁and ▁inc idents ▁in ▁North am pt ons hire ▁Category : History ▁of ▁North am pt ons hire ▁Category : Acc idents ▁and ▁inc idents ▁involving ▁London ▁and ▁North ▁Western ▁Railway ▁Category : 2 0 th ▁century ▁in ▁North am pt ons hire ▁Category : Acc idents ▁and ▁inc idents ▁involving ▁British ▁Rail ▁Category : R ail way ▁acc idents ▁in ▁ 1 9 1 5 ▁Category : R ail way ▁acc idents ▁in ▁ 1 9 5 1 ▁Category : 1 9 1 5 ▁dis aster s ▁in ▁the ▁United ▁Kingdom ▁Category : August ▁ 1 9 1 5 ▁events ▁Category : Se ptember ▁ 1 9 5 1 ▁events <0x0A> </s> ▁was ▁a ▁professional ▁Japanese ▁baseball ▁player . ▁