Albyn, Inverness. Nos 38, 81 and 83 later went on to the Shropshire & Montgomeryshire Railway. Southern Railway (1923-1948) Fifteen of the class remained in LB&SCR stock at the formation of the Southern Railway on 1 January 1923, but this figure was increased to 24 by the inclusion of those which had previously been sold to other constituent railways. Several examples were withdrawn over the next few years, and two were sold to the Weston, Clevedon and Portishead Railway in 1925 and 1937. As with the withdrawals under the LB&SCR, the engines were not withdrawn en masse, but instead over a long period of time. The first A1X to be withdrawn by the Southern Railway was No. 42 Tulse Hill in 1925, and among the engines withdrawn was the now-famous No. 55 Stepney, which only escaped being scrapped by virtue of the need for lighter engines on Hayling Island. The two locomotives, No. 43 Gipsy Hill and No.53 Ashtead, sold to the WCPR in 1925 and 1937 (see above) were renumbered No. 2 Portishead and No. 4 respectively. On the closure of that line in 1940, both locomotives entered service with the GWR, as No. 5 Portishead and No. 6 respectively, and survived into BR ownership. No. 5 Portishead was scrapped in 1954, No. 6 in 1948. Many of the locomotives remained in traffic, both departmental and in regular stock. They lasted longer than most classes of pre-grouping tank engine under the Southern Railway, primarily due to the presence of several light railways which came under the Southern Railway's jurisdiction at the grouping, such as the lines from Tenterden and Hayling Island, as well as on the Isle of Wight. Most of these lines needed small engines such as the 'Terrier' class due to severe weight restrictions. Among the engines transferred into departmental use was the former No. 82 Boxhill, which was restored to original condition, painted in the yellow ochre livery of Stroudley and used as a shunter at Brighton Works, being numbered 380S and named after the works itself. This engine was replaced by 377S, formerly No. 35 Morden, in 1948. Although much photographed toward the end of steam, this locomotive was not preserved but was scrapped at Eastleigh in 1963. With the Southern Railway concentrating on the design of larger locomotives for the increasingly heavy express passenger traffic on the South Eastern and South Western sections, with