Gresley developed a three-cylinder 4-6-0 to cope with increased loadings on the LNER’s East Anglian passenger services in the shape of the B17 Class, as he could not use his famous ‘Pacifics’ due to weight constraints. Two of the class were given A4-style streamlining in September 1937 for publicity purposes, including No. 2870 Tottenham Hotspur, which was then renamed City of London. They were designated B17/5s, but the streamlining was removed in April 1951. The locomotive, originally built by Robert Stephenson & Co in 1937, was withdrawn in April 1960.