In 1981 there were 3 turns for shunters allocated at St Blazey. One loco was used to shunt St Blazey yard, and a second locomotive was used as trip pilot travelling to Wenforbridge clay dries Monday/Wednesday/Friday. The third locomotive was a spare used to provide cover for the shunters at both St Blazey and Penzance sheds, this being a Dual-braked example to cover both the vacuum-braked "clay hood" wagons commonly used on china clay trains operating in the St Blazey area, and the passenger stock that would be shunted at Penzance.