R30402 GWR Castle Class Lockheed Hudson No.5081 Steam LocomotiveExpected Delivery June 2026 (Subject to Change at Manufacturer's Discretion). Designed as front line express passenger locomotives, the GWR 4073 Class Castles were built over a long period. The first of 155 new locomotives entered traffic in August 1923, while the last was finished at Swindon in August 1950 under British Railways. Sixteen further locomotives 15 Stars and one off Pacific No. 111 Great Bear were also rebuilt as Castles, making 171 in