The beginning of the main season was noted as being disappointing as foriegn travel coupled with industrial unrest elsewhere took its impact on those once travelling to the island.  The recently acquired diesel railcars covering nearly 13,900 miles as traffic demands continued to reduce.

While a minimal year-round service was still offered, the peak season ran between 18th May and 5th September only, and takings on the north line continued to tail off quite drastically, the south line continuing to be the most lucrative as had been the case since after the war.

Dropping numbers meant a reduction in motive power requirements, with several awaiting components which were proving difficult to source and cost prohibitive; consideration was given to obtaining further diesel motive power, and the sale of No.15 Caledonia was mooted to this end, though came to nought.