This was an improved version of a Midland 1899 design, and was primarily intended for shunting freight yards, although they were fitted out to handle passenger work as well if required.   As a result, they could be found all over the LMS network on various duties. 
Technical Data
 

Introduced : 1924
Number built : 422
Wheel arrangement : 0-6-0T

 
 

Class 3F Shunting Tank Locomotive

Class 3F 0-6-0T no. 47493 at Corfe Castle, Swanage Railway, 10th September, 2006

Preservation
4 of the class survive in preservation
3924 - Located at the Keighley and Worth Valley Railway, operational
4027 - Located at the Gloucestershire Warwickshire Railway, under overhaul
4123 - Located at the Avon Valley Railway, undergoing restoration
4422 - Undergoing overhaul. 
 
lms022001.jpg
Original Number 1944 Number  Location Built Year Built  Original Number  1944 Number Location Built  Year Built 
7100-7119 7260-7279 Vulcan Foundry 1924 7120-7134 7280-7294 North British 1924
7135-7141 7295-7301 Hunslett 1924 7142-7149 7302-7309 Hunslett 1925
16400-16459 7137-7376 North British 1924 16460-16509 7377-7426 Vulcan Foundry 1926
16510-16518 7427-7435 Hunslett 1926 16519-16534 7436-7451 Hunslett 1926
16535-16543  7452-7460 Bagnall 1926 16544-16549 7461-7466 Bagnall 1927
16550-16554 7467-7471 Vulcan Foundry 1928 16555-16560 7472-7477 Vulcan Foundry 1927
16561-16599 7478-7516 Vulcan Foundry 1928 16600-16624 7517-7541 Beardmore 1928
16625-16632 7542-7549 Hunslett 1927 16633-16645 7550-7562 Hunslett 1928
16646-16669 7563-7586 Hunslett 1928 16670-16674 7587-7591  Hunslett 1929
16675-16684 7592-7601 Bagnall 1928 16685-16723 7602-7640  Beardmore 1928
16724-16749 7641-7666  Beardmore 1929 16750-16764 7467-7681 Horwich 1930
 19-25* 7310-7316 Bagnall  1928
LMS-built Locomotives
* This batch was produced for the Somerset and Dorset Joint Railway, and was absorbed back into LMS stock in 1930.