The London Midland and Scottish Railway (LMS) 2 and 2A Boilered rebuilt 4-6-0 family was a family of express passenger 4-6-0

4-6-0

Under the Whyte notation for the classification of steam locomotives, 4-6-0 represents the wheel arrangement of four leading wheels on two axles in a leading truck, six powered and coupled driving wheels on three axles, and no trailing wheels. This wheel arrangement became the second-most popular...

 steam locomotive

Steam locomotive

A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...

s. They were reboilering of various earlier 4-6-0

4-6-0

Under the Whyte notation for the classification of steam locomotives, 4-6-0 represents the wheel arrangement of four leading wheels on two axles in a leading truck, six powered and coupled driving wheels on three axles, and no trailing wheels. This wheel arrangement became the second-most popular...

s. A total of 91 were (re)built over a period of 20 years from/to four different classes

These had started in 1935, with W.A. Stanier's rebuilding of the unique experimental high pressure compound locomotive 6399 Fury

LMS 6399 Fury

The London Midland and Scottish Railway 6399 Fury was an unsuccessful British experimental express passenger locomotive. The intention was to save fuel by using high-pressure steam, which is thermodynamically more efficient than low-pressure steam....

. 6399 had been based around the chassis of the Royal Scot Class

LMS Royal Scot Class

The London, Midland and Scottish Railway Royal Scot Class is a class of 4-6-0 express passenger locomotive introduced in 1927. Originally having parallel boilers, all members were later rebuilt with tapered type 2A boilers, and were in effect two classes.-Background:Until the mid-1920s, the LMS...

. Another locomotive was not rebuilt until 1942, when two of Stanier's Jubilee Class

LMS Jubilee Class

The London Midland and Scottish Railway Jubilee Class is a class of steam locomotive designed for mainline passenger work. 191 locomotives were built between 1934 and 1936...

 received similar boilers. These varied slightly and we so classified as 2A boilers. Instead of rebuilding more of the remaining 189 Jubilees however, which were all less than ten years old, older Royal Scot Class

LMS Royal Scot Class

The London, Midland and Scottish Railway Royal Scot Class is a class of 4-6-0 express passenger locomotive introduced in 1927. Originally having parallel boilers, all members were later rebuilt with tapered type 2A boilers, and were in effect two classes.-Background:Until the mid-1920s, the LMS...

 engines were selected for rebuilding from 1943 and eventually all members of the 70 strong class were rebuilt. Starting in 1946, 18 of the 52-strong Patriot Class

LMS Patriot Class

The Patriot Class was a class of 52 express passenger steam locomotives built for the London Midland and Scottish Railway. The first locomotive of the class was built in 1930 and the last in 1934. All of the Patriot class locomotives were withdrawn from service by 1965...

 (which shared the shame chassis as the Royal Scots) also received 2A boilers. However, the Patriot rebuilds however were largely "paper rebuilds", as not much of the original engine survived.

Dates of building and numbers of engines are given in the following table.

LMS Nos	BR Nos	Class	Rebuild source	Rebuild dates	Rebuilt by LMS	Rebuilt by BR	Total
6170	46170	British Legion LMS Royal Scot Class 6170 British Legion London Midland and Scottish Railway Royal Scot Class 6170 British Legion was a British steam locomotive.- Overview :...	6399 Fury LMS 6399 Fury The London Midland and Scottish Railway 6399 Fury was an unsuccessful British experimental express passenger locomotive. The intention was to save fuel by using high-pressure steam, which is thermodynamically more efficient than low-pressure steam....	1935	1	0	1
5735/6	45735/6	Rebuilt Jubilee LMS Rebuilt Jubilee Class The London Midland and Scottish Railway Rebuilt Jubilee Class consisted of two 4-6-0 steam locomotives.Both were rebuilt in 1942 from the LMS Jubilee Class engines—5736 Phoenix in April 1942 and 5735 Comet a month later. They were the second and third examples of the LMS 2A boilered 4-6-0...	Jubilee Class LMS Jubilee Class The London Midland and Scottish Railway Jubilee Class is a class of steam locomotive designed for mainline passenger work. 191 locomotives were built between 1934 and 1936...	1942	2	0	2
6101/2/5-7/10/13/23-30/4/6/7/40-3/8/51/3/5/6/8/62-5/7	46100-69	Rebuilt Royal Scot	Royal Scot LMS Royal Scot Class The London, Midland and Scottish Railway Royal Scot Class is a class of 4-6-0 express passenger locomotive introduced in 1927. Originally having parallel boilers, all members were later rebuilt with tapered type 2A boilers, and were in effect two classes.-Background:Until the mid-1920s, the LMS...	1943-1955	43	27	70
5514/21/6/8-31/40	45512/14/21-3/25-32/4-6/45	Rebuilt Patriot LMS Rebuilt Patriot Class The London Midland and Scottish Railway , Rebuilt Patriot Class was a class of 4-6-0 steam locomotives. They were rebuilt from LMS Patriot Class locomotives over the period 1946-1949.The Patriot class were the fourth type of LMS 2A boilered 4-6-0,...	Patriot LMS Patriot Class The Patriot Class was a class of 52 express passenger steam locomotives built for the London Midland and Scottish Railway. The first locomotive of the class was built in 1930 and the last in 1934. All of the Patriot class locomotives were withdrawn from service by 1965...	1946-1949	8	10	18
Total				1935, 1942-1955	54	37	91

Withdrawal

All 91 locomotives were withdrawn from stock between 1961 and 1965.

Year	British Legion	Rebuilt Jubilees	Rebuilt Royal Scots	Rebuilt Patriots	Total
1961	0	0	0	2	2
1962	1	0	29	0	30
1963	0	0	15	5	20
1964	0	2	21	8	31
1965	0	0	5	3	8
Total	1	2	70	18	91