North Walsham, launched the public service. Pilgrim was the sole locomotive, although the nearby Wells Harbour Railway was an available source of alternative motive power in an emergency. In 1985 the diesel locomotive No 2 Weasel entered service as reserve engine, and for out-of-season operations, and engineering trains. High powered locomotives Growing passenger figures quickly necessitated more powerful engines. In 1986 two larger locomotives were built, entering service for the 1987 season; these were the new 2-6-0+0-6-2 Garratt locomotive No 3 Norfolk Hero and the Bo-Bo diesel locomotive No 4 Norfolk Harvester. These two engines provided the main service, with Weasel in reserve and out-of-season use, whilst Pilgrim was sold. The need for a second high-powered steam engine was quickly established and locomotive No 5 arrived on loan in 1995. This engine, which was never owned by the railway, had marginally different gauge standards (the range of measurements of elements of the wheelsets of a vehicle, in addition to the strict gauge from flange to flange), and proved unsuitable, as the newly established practice of running in reverse from Walsingham to Wells meant that the engine led with its tender, and the slightly different measurements, coupled with the lighter weight of the leading tender, led to the tender regularly derailing. The engine was little used, and eventually withdrawn, and plans were made to replicate the highly successful Garratt design of Norfolk Hero, with an order placed for locomotive No 6 Norfolk Heroine, which entered service in 2010. With the planned future introduction of a two-train summer service, it is intended to have three steam locomotives on site. The railway's Garratts (No 3 and No 6) are the principal steam engines, and a third steam locomotive will be brought on site on loan; meanwhile original locomotive No 1 returned to the line in 2014, and is currently available for service at Wells. Table of locomotives Other locomotives on site In addition to the railway's own locomotives, one privately owned engine is currently on site at Wells. This is the mogul type steam locomotive, simply called No 4, which was constructed in 2012 by Tony Martin, the chief engineer of the Wells and Walsingham Light Railway, using the former boiler of Norfolk Hero as the basis for the project. The mogul is rarely used on W&WLR passenger services, but can sometimes be observed operating privately on the railway, out of hours. In