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London Brighton and South Coast Railway Class G
Stroudley 'G' class single
Type and origin Power type Steam Designer William Stroudley Build date 1874–1882 Total produced Grosvenor: 1 Abergavenny: 1 remainder: 24
Specifications Configuration: ​  • Whyte 2-2-2 Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. Grosvenor: 6 ft 9 in (2,057 mm) Remainder: 6 ft 6 in (1,981 mm) Trailing dia. 4 ft 6 in (1,372 mm) Wheelbase 15 ft 9 in (4.80 m) Adhesive weight 14 LT (14.2 t; 15.7 short tons) Loco weight 35.6 LT (36.2 t; 39.9 short tons) (Grosvenor as built) 34.2 LT (34.7 t; 38.3 short tons) (Abergavenny) 33.4 LT (33.9 t; 37.4 short tons) (remainder) Firebox: ​  • Grate area 17 sq ft (1.6 m2) Boiler pressure 150 lbf/in2 (10 bar; 1,034 kPa) Heating surface: ​  • Tubes 1,022 sq ft (94.9 m2)  • Total surface 1,132 sq ft (105.2 m2)(Grosvenor as built) 1,077 sq ft (100.1 m2)(Abergavenny) 1,200 sq ft (110 m2) (remainder) Cylinders 2 Cylinder size 17 in × 24 in (432 mm × 610 mm) Loco brake Steam operated wooden block brakes
Career Operators London, Brighton and South Coast Railway Class G Locale Great Britain First run 1874 Withdrawn 1907-1914 Disposition All scrapped

The LB&SCR G class were powerful 2-2-2 locomotives, designed by William Stroudley of the London, Brighton and South Coast Railway in 1874.

A prototype single locomotive, No. 151 Grosvenor, was designed by Stroudley and produced by Brighton railway works in December 1874. This was extensively tested before a second, scaled down locomotive No. 325 Abergavenny, was ordered in June 1876 and completed in January 1877. Both locomotives performed adequately, but Abergavenny was significantly less powerful than Grosvenor. A modified design was developed and twelve further locomotives were built between December 1880 and November 1881. The members of this class worked express trains between London and South Coast towns such as Portsmouth, Brighton and Eastbourne, and covered large mileages. The introduction of the Billinton B2 class made the singles redundant on the Portsmouth line and so several were transferred to Tunbridge Wells.

Withdrawals began in May 1907, and the last locomotive survived until May 1914. No examples have been preserved, but there is a model of No. 331 Fairlight in the museum at Sheffield Park on the Bluebell Railway.

• Bradley, D.L. (1969). The locomotives of the London, Brighton & South Coast Railway: Part 1. The Railway Correspondence and Travel Society.^{[page needed]}
• Ahrons, E.L. (1927). The British Steam Railway Locomotive from 1825 to 1925. London Locomotive Publishing Co. Ltd. p. 187.

• [1] Southern E-Group