| GER Class D81 LNER Class J20 | |||||||||||||||||||||||||||||||||
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 J20 No. 4697 rests along with numerous other freight engines at March Locomotive Depot on Sunday 14 July 1946 | |||||||||||||||||||||||||||||||||
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TheGER Class D81 was a class of twenty-five0-6-0 steam locomotives designed byA. J. Hill for theGreat Eastern Railway. The all passed to theLondon and North Eastern Railway at the1923 grouping and received the classificationJ20.
These locomotives were fitted with 20-by-28-inch (508 mm × 711 mm) cylinders and 4-foot-11-inch (1.499 m) wheels, while theBelpaire firebox-fitted boiler was identical to that fitted to theClass S69 4-6-0s. They were the most powerful 0-6-0 tender locomotive in Britain until the arrival ofOliver Bulleid'sQ1 class for theSouthern Railway in 1942.[1]
| Year | Order | Manufacturer | Quantity | GER Nos. | LNER Nos. | 1946 Nos. | Notes |
|---|---|---|---|---|---|---|---|
| 1920 | D81 | Stratford Works | 5 | 1270–1274 | 8270–8274 | 4675–4679 | |
| 1922 | M87 | Stratford Works | 10 | 1275–1284 | 8275–8284 | 4680–4689 | |
| 1922 | Y87 | Stratford Works | 10 | 1285–1294 | 8285–8294 | 4690–4699 |
All were still in service at the 1923 grouping, the LNER adding 7000 to the numbers of nearly all the ex-Great Eastern locomotives, including the Class D81 locomotives. Between 1943 and 1956 the class was rebuilt with round-top fireboxes, and reclassified as J20/1.[1][2]
At nationalisation in 1948,British Railways added 60000 to their LNER numbers. They all continued in service until 1959, when the first was withdrawn; all were gone by the end of 1962.[1]
| Year | Quantity in service at start of year | Quantity withdrawn | Locomotive numbers | Notes |
|---|---|---|---|---|
| 1959 | 25 | 3 | 64675/83/88 | |
| 1960 | 22 | 9 | 64678/81–82/84–86/93–95 | |
| 1961 | 13 | 8 | 64676–77/79–80/89/92/97–98 | |
| 1962 | 5 | 5 | 64687/90–91/96/99 |
