- ‘A’ 0-8-0 Locomotive Class
- Webb’s
 first type of 0-8-0 goods engine, of which 111 were built from 1893. They were 3-cylinder compound engines with a huge low pressure cylinder between the frames. The designation ‘A’ was applied retrospectively from 1911. They were all rebuilt by Whale or his successors into 2-cylinder simple engines of classes ‘C’, ‘C1’, or ‘D’. In modified form some lasted into BR ownership. 
- Alfred the Great Locomotive Class
- A development of the Jubilee class of 4-cylinder compound passenger engine but with a larger boiler. 40 examples were built at Crewe Works between 1901 and 1903. They superseded the Jubilee engines on the heaviest express trains. In 1903 one engine (No.1952 Benbow) was modified to have four independent sets of valve gear in place of the two sets as originally fitted and all forty engines were converted before the end of 1907. See also Benbow class.
- ‘B’ Class 0-8-0 Locomotive class
- Webb’s second type of 0-8-0 goods engine, of which 170 were built from 1901. They were 4-cylinder compound engines easily identified by their long overhang at the front and a piano-shaped casing at the front of the inside cylinders which covered the rocking levers which operated the valve for the outside cylinders from the inside valve gear.
- Baby Scot
- Colloquial name for the ‘Patriot’ class 3-cylinder 4-6-0 locomotives designed by Sir Henry Fowler for the LMS, the first few of which included components from scrapped LNWR ‘Claughton’ class engines. The name came into use because visually the engines resembled a smaller version of Fowler’s ‘Royal Scot’ class locomotives.
- Beames 0-8-4T Locomotive Class
- A tank version of the successful class G2 superheated 0-8-0 goods engines, with side tanks, a long bunker and trailing bogie. Intended primarily for the steep gradients in south Wales, where they were used for both passenger and goods trains.
- Benbow Locomotive Class
- In 1903 Alfred the Great class 4-4-0 No.1952 BENBOW was modified to have four independent sets of Joy valve gear in place of two sets. In the original design the outside valves were actuated by rocking levers. The modification was a success and all forty Alfred the Great engines were modified, then being known as the ‘Benbow’ class. The Benbow design was approved by F.W. Webb before his retirement, but implemented by his successor G. Whale.
- “Bill Bailey” Locomotive Class
- Nickname for 1400 4-6-0 Locomotive class.
- Bissell Tank 0-4-2T Locomotive Class
- In 1896 Mr. Webb introduced a class of 0-4-2 square saddle tanks for work in docks, and 20 were built in by early 1902. To enable them to negotiate sharp curves, they had a coupled wheelbase of only 7ft 6in, and Bissell truck at the rear with solid wheels.
- Bloomer Locomotive Class
- The most famous engines on the Southern Division were the ‘Bloomers’. They were introduced in 1851 and were inside-cylinder inside-frame single-wheelers. Designed by McConnell. See also Extra Large Bloomer, Large Bloomer, and Small Bloomer.
- Britannia
- A traditional depiction of Britannia was the main feature of the LNWR coat of arms. It seems unlikely that it was patriotism which led the former Crewe apprentice, Riddles, to take the name “Britannia” for the first standard express locomotive introduced by British Railways.
- Bulldogs
- Nickname for “D” Locomotive class.
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