Big City Engine/Behind the Scenes

The Railway Series
The Big City Engine is a fictional standard gauge tender engine created by the Rev. W. Awdry. He appears in The Railway Series book, The Eight Famous Engines, which was published in 1957. His last illustrated appearance was in Famous Engines, published in 1976.

Big City Engine as he appears in the Railway Series:

Television Series
The story "Gordon Goes Foreign" from the Railway Series book The Eight Famous Engines was originally going to be adapted for the second series of the television series. To save money, the production crew wrote in concept art that Henry's Gauge 1 model would be modified to represent the Big City Engine. It is also noted that the engine would have a new face mask and smoke deflectors. However, due to the expensive budget, the episode was cancelled before filming was under way, and thus the engine never materialized in the television series.

If he had appeared in the television series, the Big City Engine would have been based on an LMS Stanier 5MT "Black 5" 4-6-0 with smoke deflectors.