FHN 923, affectionately known as “The Old Darling,” has a long and storied history that reflects both the evolution of British transport and the enduring legacy of United’s fleet. Originally purchased by United on the 5th of June, 1940, FHN 923 began life as a ‘K’ type double-decker bus. At the time, the 'K' type was a robust and practical design, popular for urban and suburban routes. Its initial decade of service was spent operating out of Redcar, a period during which the vehicle faithfully transported passengers and earned its reputation for reliability.

In 1950, after ten years in Redcar, the bus was transferred to Jesmond, a suburb of Newcastle upon Tyne. Here, it continued its role as a passenger vehicle, adapting to the demands of a different route network. However, in 1956, the bus underwent a significant transformation. United’s Central Works in Darlington undertook a major conversion, converting FHN 923 from a passenger bus into a tow truck. This conversion was a testament to the versatility of the original Bristol design, allowing a vehicle initially built for carrying passengers to be repurposed for mechanical recovery work.

Once converted, FHN 923 was stationed in Darlington as a recovery vehicle. In this role, it provided essential support for United’s fleet, recovering buses and vehicles that had broken down or been involved in accidents. Its service in Darlington continued for two years until 1958, when it was moved to Middlesbrough. Here, it continued its work as a dependable tow truck, supporting the fleet through numerous mechanical challenges. In 1975, the vehicle was again relocated, this time to Scarborough, demonstrating its continued utility and adaptability over three decades of service.

After an impressive career spanning 38 years, FHN 923 was finally withdrawn from active duty in 1978. At the time of its withdrawal, it held the distinction of being the longest-serving vehicle in United’s fleet, a remarkable achievement highlighting both the durability of the Bristol design and the meticulous care it had received throughout its life. Following its retirement, the vehicle was purchased by Charlie Bullock, who acquired it as a personal project upon his own retirement.

In November 2005, FHN 923 found a permanent home when it was sold to this Society for safekeeping and preservation. Today, “The Old Darling” stands as a cherished piece of transport history. Its long service life, multiple relocations, and unique transformation from bus to tow truck make it a rare and fascinating example of mid-20th-century British transport engineering. For enthusiasts and historians alike, FHN 923 offers a tangible connection to the past, illustrating the adaptability, resilience, and longevity of vehicles within the United fleet.