Caldon Low quarry in Staffordshire was at the end of a rambling branch line from Leekbrook Junc and thence Stoke-on-Trent. Due to the gradients trains were worked in two portions from Leekbrook and here 25059 arrives with the first, 7K06, the 0907 from Longport Pinnox Sdgs, on 24th November, 1986.