page_title: LNER Class B17
section_title: Sub-classes
hierarchical_section_title: LNER Class B17 / Construction / Sub-classes
caption_attribution_description: English: Gresley 'Sandringham' 4-6-0 at Cambridge. Backing out of the Locomotive Yard near the north of the Station is B17/6 4-6-0 No. 61623 'Lambton Castle', built 2/31 as B17/2 No. 2823 (No. 1623 from 1946), converted to B17/6 in 4/48, withdrawn 7/59.
context_page_description: The London and North Eastern Railway Class B17, also known as "Sandringham" or "Footballer" class was a class of 4-6-0 steam locomotive designed by Nigel Gresley for hauling passenger services on the Great Eastern Main Line. In total 73 were built.
context_section_description: The first ten by the North British Locomotive Company were designated B17, later B17/1. The second and third batches had boilers supplied by Armstrong Whitworth and different springing and became B17/2. The next two batches had different springing and were designated B17/3. However, as the locomotives passed through the works the original springs were replaced by those of the later design and in 1937 the three sub-classes were merged into B17/1. The final Darlington batch introduced in 1936, and those built by Robert Stephenson and Company had 4,200-imperial-gallon (19,000 l; 5,000 US gal), 7.5-long-ton (7.6 t) tenders and were intended for use in the North Eastern area of the LNER: these were designated B17/4.
  In September 1937 two locomotives (Nos. 2859 Norwich City and 2870 Tottenham Hotspur) were streamlined in the manner of the LNER Class A4s, renamed East Anglian and City of London and intended for use on the East Anglian train. They were designated B17/5. However, the streamlining was cladding for publicity purposes only and had little effect on the overall speed of the locomotive. By 1951 both engines had been stripped of the streamlining altogether.
  Between 1943 and 1957 most of the surviving members of the class were rebuilt with a LNER 100A boiler with increased pressure and were designated B17/6.
caption: B17/6 No. 61623 'Lambton Castle' at Cambridge 28 February 1951.
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