Charles Collett (1871-1952) succeeded G.J Churchward as Chief Mechanical Engineer of the GWR in 1922. Collett has been accredited more with the implementation of the locomotives designed and planned by his predecessor than of his own original works. However, Collett made huge improvements on the manufacturing processes, design improvements and standardisation within the GWR. This can perhaps be best appreciated on his design of the coaches of the GWR. His Collett coaches were produced as a result if stringent testing and standardisation of the best bogie designs to ensure the carriages offered the best in ride and comfort. Several Collett Coaches survive on heritage railways today.

• Several Collett coach styles and livery options are modelled by Dapol. Features of the Collett Coach includes:
• Highly detailed body, underframe and bogies
• Fine application of livery and crest detail.