Oliver is painted in the North Western Railway's green livery with the 1934 GWR crest painted on the sides of his tanks and the number "11" painted on the sides of his cab in yellow
Oliver is based on a GWR 14xx Class 0-4-2T. These engines were fitted with a mechanical system allowing the driver to control the locomotive remotely from the cab of an 'Autocoach', such as Isabel. They were originally assigned numbers in the 48xx series, but were renumbered into the 14xx series in 1946.
- To date, Justice and Atrocity are Oliver's only speaking roles.
- Oliver is age 5 in The Stories of Sodor.
Stories of Sodor
- Cows (cameo)