These locomotives were fitted with 17+1⁄2-by-24-inch (444mm ×610mm) cylinders and 5-foot-8-inch (1.727m) diameter driving wheels. They were a tank engine version of the T26 class 2-4-0s, albeit with a 3-inch (76mm) shorter coupled wheelbase. They shared the same type of boiler as that class, as well as the N31 and later Y14 class 0-6-0s. They were intended for use on long-distance stopping services,[1] and so they were all initially fitted with Westinghouse air brake equipment.
The R33 and D53 batches had been fitted with condensing equipment from new, but the LNER gradually removed them from all but one locomotive, the exception being an early retirement.
All had survived to pass to the LNER in 1923; the first retirement started in 1936 when 8090 was withdrawn.
Thirty-seven locomotives lasted long enough to be renumbered in the 1946 scheme; fifteen of them became the property of British Railways in 1948, but only three of them lasted long enough to receive their BR number.
Aldrich, C. Langley (1969). The Locomotives of the Great Eastern Railway 1862–1962 (7thed.). Wickford, Essex: C. Langley Aldrich. OCLC30278831.
Baxter, Bertram (2012). Baxter, David; Mitchell, Peter (eds.). British Locomotive Catalogue 1825–1923. Vol.6: Great Eastern Railway, North British Railway, Great North of Scotland Railway, Midland & Great Northern Joint Railway, remaining companies in the LNER group. Southampton: Kestrel Railway Books. p.82–83. ISBN978-1-905505-26-5.
Fry, E. V., ed. (April 1964). Locomotives of the L.N.E.R., part 7: Tank Engines - Classes A5 to H2. Kenilworth: RCTS. pp.61–64. ISBN0-901115-13-4.{{cite book}}: CS1 maint: ignored ISBN errors (link)