Highland Railway Castle Goods Class

The Highland Railway Castle Goods Class was a series of 4-6-0 mixed-traffic and goods locomotives designed by Peter Drummond and built at Lochgorm Works, Inverness, from 1907, representing a goods-oriented development of the Castle Class express passenger 4-6-0. The Castle Goods Class used smaller coupled driving wheels than the passenger Castle Class — 5 ft 3 in rather than 6 ft 0 in — giving greater tractive effort for the heavier goods and fish traffic on the Highland Railway's demanding gradients at the cost of some maximum speed.

The fish traffic was commercially one of the most important Highland Railway freight flows: the freshly caught herring, cod, and other fish from the ports at Wick, Thurso, and the west-coast fishing villages needed rapid transport to the southern markets, and the Highland Railway's fish specials ran on almost-express schedules with priority over slower goods. The Castle Goods Class, with its 4-6-0 adhesion and reasonable speed capability, was well suited to this demanding mixed role.

After the 1923 Grouping the class passed to the LMS. None was preserved.