| Power Classification | 2MT |
| Introduced | 1953 – 1957 |
| Designer | Riddles, designed at Derby |
| Company | BR |
| Weight | 63t 5cwt |
| Driving Wheels | 5ft 0ins |
| Boiler Pressure | 200psi superheated |
| Cylinders | Outside – 16½in x 24in |
| Tractive Effort | 18,515lbf |
| Valve Gear | Walschaert (piston valve) |
These locomotives were designed for light passenger work and were fitted for push-pull work. They were similar in design to the LMS Ivatt 2MT class of 41200 introduced in 1946 but were modified to fit a universal loading gauge and utilising standard fittings. The 84000 class was the tank engine version of the Standard 78000 class introduced in 1952 which was based on the Ivatt 2-6-0 46400 class introduced in 1946.
When the Standard 84000 class were introduced there were already 130 of the Ivatt tanks working so there was not a large demand for many new locomotives.
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Standard 84000 class introduced in 1953 |
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LMS 2MT 2-6-2T designed by Ivatt and introduced in 1946. |
|
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78000 class introduced in 1952 |
The first twenty engines were built at Crewe in 1953 for use on the London Midland Region. They replaced older 2-4-2T and 0-4-4T engines of pre-grouping design on branch line passenger trains. The last ten engines were built at Darlington in 1957 for use on the Southern Region.
In 1960, 84020 was taken to Eastleigh for conversion and trials for working on the Isle of Wight. This plan was abandoned before conversion could take place. However, in 1965 the plans were revived and ten engines (84010, 84013-17, 84019, 84025, 84026 and 84028) were transferred (on paper) from the London Midland Region to Eastleigh for transfer to the Isle of Wight. Again these plans were abandoned and the transfer was cancelled.
The LMR locomotives were used on push-pull routes, and were often allocated alongside the Ivatt 2MT 2-6-2T engines with which they shared most of their origins. Numbers 84021–84029, the Southern Region locomotives were all allocated to the Eastern Section depot at Ashford for use on the lines over Romney Marsh and local trains on the Margate via Canterbury West route. Most were transferred away to the North Eastern Region in the early 1960s following electrification, but several locomotives (including some of the LMR allocation) were re-allocated to Eastleigh in 1965 for possible use on the Isle of Wight replacing life expired ex-London and South Western railway O2 0-4-4T engines, which dated from the turn of the century. However, this did not cover coaching stock replacement, and thus the locomotives were scrapped.
Number in Service.
| Built | Withdrawals | No. in Service | 41200 class in Service | ||
| BR Numbers | Quantity | ||||
| 1946 |
10 |
||||
| 1947 |
10 |
||||
| 1948 |
30 |
||||
| 1949 |
60 |
||||
| 1950 |
90 |
||||
| 1951 |
100 |
||||
| 1952 |
130 |
||||
| 1953 | 84000-84019 |
20 |
20 |
130 |
|
| 1954-56 | 20 |
130 |
|||
| 1957 | 84020-84029 |
10 |
30 |
130 |
|
| 1958-61 | 30 |
130 |
|||
| 1962 | 30 |
109 |
|||
| 1963 |
1 |
29 |
91 |
||
| 1964 |
9 |
20 |
65 |
||
| 1965 |
20 |
0 |
39 |
||
| 1966 |
8 |
||||
| 1967 |
0 |
||||
- 84000-84019 were built at Crewe
- 84020-84029 were built at Darlington
- Two members of the class (84027 and 84029) were only in service for seven years before being withdrawn in May and June 1964.
Allocation of locomotives in service as at 1st of January.
|
1954 |
1956 | 1958 | 1960 | 1962 | 1963 | 1964 |
1965 |
|
| Western Region | ||||||||
| Southern Region | 10 |
10 |
||||||
| London Midland Region |
20 |
20 | 19 | 10 | 29 | 30 | 29 |
20 |
| North Eastern Region | 1 | 1 |
1 |
|||||
|
20 |
20 | 30 | 30 | 30 | 30 | 29 |
20 |
|
| Southern Region | ||||||||
| Ashford | 5 |
10 |
||||||
| Ramsgate |
5 |
|||||||
|
10 |
10 |
|||||||
| London Midland Region | ||||||||
| Annesley | 3 |
2 |
||||||
| Bank Hall |
2 |
|||||||
| Bedford |
1 |
1 | 1 | 1 |
2 |
|||
| Birkenhead | 2 |
2 |
||||||
| Bletchley |
2 |
2 | 2 | 2 | 1 |
1 |
||
| Bolton | 3 | 6 | 5 | 5 |
3 |
|||
| Burton |
3 |
3 |
3 |
|||||
| Bury |
4 |
|||||||
| Chester Northgate | 1 | 1 |
1 |
|||||
| Crewe Works | 4 |
4 |
||||||
| Fleetwood |
4 |
2 | 4 | 6 | 6 | 4 |
4 |
|
| Kentish Town |
2 |
|||||||
| Lancaster | 2 |
1 |
||||||
| Lees Oldham |
4 |
3 |
||||||
| Llandudno Junction | 3 | 3 | 4 |
2 |
||||
| Leicester Midland | 1 | 1 |
3 |
|||||
| Lower Darwen | 2 |
2 |
||||||
| Low Moor |
6 |
|||||||
| Neasden |
2 |
|||||||
| Oswestry | 2 |
2 |
||||||
| Plodders Lane |
5 |
|||||||
| Rhyl | 1 |
1 |
||||||
| Rose Grove |
1 |
|||||||
| Royston |
1 |
1 |
||||||
| Skipton | 1 | 2 | 2 | 2 |
2 |
|||
| Southport |
1 |
|||||||
| Stockport Edgeley |
3 |
|||||||
| Warrington Dallam | 4 |
1 |
||||||
| Wellingborough | 3 |
3 |
||||||
| Wrexham Rhosddu |
4 |
|||||||
|
20 |
20 | 19 | 19 | 29 | 30 | 29 |
20 |
|
| North Eastern Region | ||||||||
| Hull Dairycoates | 1 |
1 |
||||||
| Royston |
1 |
|||||||
| 1 | 1 |
1 |
||||||
|
20 |
20 | 30 | 30 | 30 | 30 | 29 |
20 |
- Only one member of the class worked from an Eastern Region depot. This was 84009 which was transferred from the London Midland Region when Royston came under North Eastern Region Control in September 1956. 84009 subsequently moved to Hull Dairycoates before returning to the London Midland Region at Llandudno Junction in December 1962.
- 84000 and 84004 were based on the Western Region for a short period in 1963 at Oswestry which came under London Midland Region control in September 1963.
- Some of the Southern Region engines spent a few months at Bricklayesrs Arms, Exemouth Junction and Brighton before moving to London Midland Region depots.
- As noted earlies some locomotives were briefly allocated to Eastleigh (on paper) as part of the plans to use them on the Isle of Wight but these plans were never fulfilled.
New Build
No members of the class were preserved – possibly because none were sold for scrap to Woodham Brothers at Barry. The last was cut up at Buttigiegs in Newport in September 1966.
