On 13/06/1988 Loco 56062 was working the empty stone train from Ardingly to Westbury when it passed the signal protecting the Brighton mainline at Copyhold Junction and was derailed on the catch points. The loco ended up at the foot of the embankment.
56062 laid on it's side at the foot of the embankment at Copyhold Junction. The loco and and it's train of empty Amey Roadstone hoppers returning from Ardingly to Haywards Heath passed the signal protecting the junction at danger. The loco and leading wagons were derailed on the catch points with 56062 ending up down the embankment.
It was a difficult site to the recover the locomotive and the steel pilling used to shore up the embankment can be seen to this day.