SR West Country and Battle of Britain Classes - Construction

Construction

For construction history of the class, see: List of SR West Country and Battle of Britain class locomotives

The first batch of twenty locomotives was ordered in April 1941, although the changes in design to the Light Pacific arrangement meant that production was delayed until late 1944. Due to wartime contract work at Brighton works, the boilers were built under contract at the North British Locomotive Company. Before the first of the class had been delivered, the order was increased to thirty, with a second batch of ten ordered in September 1944. Deliveries from Brighton works began in May 1945 with prototype No. 21C101 Exeter, and proceeded at the rate of about two locomotives per month. The class was gradually run in on the Central Section until October 1945, when they were successfully trialled on Plymouth and Kentish services. By the time the first fifteen had entered traffic a further order of fifteen was placed, with these entering service between June and October 1946. From this batch onwards, traction was improved by the addition of steam sanding to the front driving wheel, with covers added to protect the motion from sand falling from the filler pipes.

A third batch of twenty-five was ordered and designated the Battle of Britain class. These were identical to the West Country class and the new designation was purely concerned with giving the locomotives names that befitted their intended allocation to the Eastern Section. By the time of the nationalisation of British Railways in January 1948, seventy Light Pacifics had been built at Brighton Works, with a fourth batch of twenty on order. There was a delay in production during the first three months of British Railways control but the last twenty ordered by the Southern Railway entered traffic between April 1948 and February 1949.

In March 1949, British Railways ordered a final 20 from Brighton works despite a pressing need for smaller tank locomotives. This imbalance was rectified by building forty-one examples of the LMS Fairburn 2-6-4T for the Southern Region. Also at this time Brighton works staff were embroiled in the difficulties associated with Bulleid's experimental and problematic Leader class. As a result, Brighton sought assistance from the other Southern Region works to complete this final order. Ashford works cut the frames and constructed the tenders, and Eastleigh works constructed six of the final batch of locomotives.

The completion of the final locomotive, No. 34110 66 Squadron, in January 1951 was delayed for several months pending consideration of proposals from British Railways management for a major modification to a standard two-cylinder design without the chain-driven valve gear., but the locomotive entered service as Bulleid intended.