| Locomotive Number | Build Date (Batch) | Location Built | Notes |
| 6311 | Swindon Works, GWR |
 GWR 43XX 6357 at rest in the yard at Bala with 3749 standing on the coal road. Croes Newydd sent a mogul to Bala in case of engineering work on the line as the water capacity of a tender engine made staying on site easier for the locomotive should it be needed for any duties compared to the limited water of a tank engine |  GWR 43XX 6311 pulls into Bala Junction from Bala on the relief line with a lengthy train of box vans, oil tanks and open wagons working through to either Ruabon or Croes Newydd yards | |