short formation and high power leading to very good performance. This arrangement lasted for one year. At the end of this period 50031 failed whilst working an ECS (Empty Coaching Stock) train, again for ATW. During the summer of 2008 50044 "Exeter" was fitted with OTMR, and the TPWS fitted previously was commissioned. In October 2008 '44 was re-registered for mainline use, and operated its first revenue mainline train on 18 October 2008, when it worked, in multiple with 50049 "Defiance" on a railtour from Manchester Piccadilly to Minehead. Several owning groups have ceremonially re-dedicated their locomotives to the warships whose names they carry. The HMS Hood Association rededicated 50031 Hood at the Mid Hants Railway, unveiling new crests. The crew of HMS Exeter re-dedicated D444 Exeter at the Severn Valley Railway a year before the vessel was decommissioned, unveiling a crest and early-BR-style nameplates. The captain of HMS Ark Royal performed the re-dedication ceremony for 50135 Ark Royal at the Eastleigh 100 Open Days. October 2018 saw the Severn Valley Railway host the 'Class 50 Golden Jubilee' gala, celebrating fifty years since the class was introduced into traffic. Eleven of the eighteen preserved 50s attended the event, these being: 50007, 50008, 50015, 50017, 50026 (non-operational), 50031, 50033, 50035, 50044, 50049 and 50050. This made it the largest gathering of a single type of locomotive in preservation history. Of significance was 50033, which had undergone a speedy overhaul since transferring to the railway in May of that year, hauling its first passenger trains since 2004. Seven of the preserved Cass 50s have operated on the mainline in preservation, these being: 50050 Fearless, 50007 Hercules, 50008 Thunderer, 50017 Royal Oak, 50031 Hood, 50044 Exeter and 50049 Defiance. List of preserved locomotives Model railways Lima produced the first model of the Class 50 in OO gauge – initially in unrefurbished condition – with Graham Farish producing the type in British N gauge. Neither of these models are now available new, but second-hand models do appear from time to time. In 2003, Hornby Railways launched its first version of the BR Class 50 in OO gauge. Hornby have since updated the Class 50 and have produced models of 50007 Hercules and 50049 Defiance in GBRF colours as part of their 2020 range. Recently, Heljan have also made models of Class 50 in O gauge which includes 50007 Hercules as Sir Edward Elgar in