Tidmouth’s gasworks, operated by West Sodor Power & Gas Co., were accessed from the Tidmouth East assembly sidings.

Like many of the dockside businesses, it had its own little shunting engine. A trainload of coal would arrive, and the gasworks gates opened, the diminutive loco scuttled out, collected the wagons, and disappeared back into the gasworks complex, like a mouse stealing cheese. The WSP&G Co. line also had a steeply-graded spur heading up the valley to the falls of the River Tid, servicing the hydro electric plant there.