|Railway Series Portrait|
|Position||Arlesdale Railway engine|
|Age||117 (as of 2011)|
|Status||Operational. Built in 1894. Rebuilt in 1981.|
Bert is a tender engine who works on the Arlesdale Railway.
Bert was told by the Small Controller that he would take a passenger train on the day of the grand opening of the Arlesdale Railway. On the day of the grand opening, Bert broke down at a station and was rescued by Mike. The Small Controller promised Bert to get him rebuilt. He later heard whispers and it turned out to be Duke. In 1994, Bert told Douglas that the farmers' produce of wool would be carried by road instead of rail. In 2009, Duck told Bert about Gordon's accident with the lorry outside East Knapford. Following that, he has a non-speaking role in the episode, Rough Start and in Cold Reception spoke to Olivia about the woman before speaking to the person about her anger with the woman.
Bert then spoke to Rex at the shed about the woman which he reveals to be Jane Albworth, one of three children to the deceased Sir Walter Albworth. Rex told Bert about Olivia's anger with his children from Rough Start before heading off to a lead mine to help out with some construction work before Olivia managed to come in and the green tender engine spoke to her next after she arrived.
In Storm Damage, Bert took Charlie Hatt for a ride in his train while the middle child explained how he was trying to find Atlas. The blue engine then told this to the other locomotives, but they hadn't heard anything. He was also going up to Cas-ny-Hawin when the storm hit, due to be there in 10 minutes.
Bert is based on River Irt, a miniature engine on the Ravenglass and Eskdale Railway.
- Season 2 - Little Engines (cameo), Grand Opening and Whispers
- Season 3 - Useful Engines (mentioned)
- Season 5 - Harvest Season
- Season 1 STMY - Rough Start (does not speak) and Cold Reception
- Season 2 STMY - Food for Thought, Storm Damage
- Winds of Change (cameo)