M51192 is a Class 101 railcar, built in 1958 to serve Birmingham. It spent much of its working life operating in the Northwest of England and Wales before moving to East Anglia in the late 1980’s, Scotland in the 1990’s, and finally Manchester in the early 2000’s. It was subsequently preserved and placed in the National Collection under the National Railway Museum. It never arrived at their museum however, going immediately on loan to first the East Lancashire Railway before moving to the North Norfolk in 2012.

M51192 performed regularly at the NNR for five years before suffering an engine failure in 2018 which put the vehicle out of service. Repairs were delayed due to resources being committed elsewhere but following a period of overhaul from 2023-2025 the vehicle has been mechanically repaired and externally refreshed, returning to passenger traffic in April 2025. It remains on loan and part of the National Collection.

On re-entering service M51192 has been presented in the rare yet striking British Railways Green with full yellow end livery. Whilst common on diesel locomotives, comparatively few railcars received the full yellow end during the green era, being painted straight into the new corporate blue colour scheme instead. However, a handful of examples from each railcar class received the yellow ends and operated as such during the late 1960’s. M51192 is the first Class 101 in the preservation era to fully carry this variation, and is currently the only railcar of any type in this livery operating in service. The vehicle rejoins the NNR railcar fleet, which can now showcase all four front end livery variations from the British Railways Green era to visitors.