Whipsnade_Zoo_engine_shed_5.1974. UK heritage steam in the 1960s and 1970s. Whipsnade Zoo Railway’s engine shed in May 1974. Inside were 2ft-6in gauge 0-6-2T Nos. 3 Conqueror and 4 Superior (Bagnall 2192/1922 and Kerr Stuart 4034/1920, respectively), while outside was No.1 Chevalier (Manning Wardle 1877/1915). roger.griffiths@hotmail.com