"This derailment, which led to the unfortunate collision which followed almost immediately, was the direct result of the bad riding characteristics of " Cemflo " bulk cement wagon No. LA 233, which, as a result of excessive lateral oscillation giving rise to accelerations greater than the safe limit for four wheeled goods wagons, became derailed at a point where there were minor track irregularities, which were nevertheless within the specified tolerances for the line concerned. The bad riding characteristics stemmed from the fact that the type of suspension provided, though satisfactory on other types of wagons and used extensively on the Continent, has, with the prevailing clearances in the suspension components...proved unsuitable on this type of wagon."