LSWR A12 class

LSWR A12 class

Withdrawn A12 class No. 555 dumped at the far end of Eastleigh Locomotive Yard 11 July 1946

Type and origin Power type Steam Designer William Adams Builder LSWR Nine Elms Works (50) Neilson & Co. (40) Build date 1887–1894 Total produced 90

Specifications Configuration 0-4-2 UIC class B1n Gauge 4 ft 8 1⁄2 in (1,435 mm) Driver dia. 73 in (1.854 m) Trailing dia. 48 in (1.219 m) Boiler pressure 160 psi (1.10 MPa) Cylinders Two, inside Cylinder size 18×26 in (457×660 mm)

Performance figures Tractive effort 15,690 lbf (69.79 kN)

Career Operators London and South Western Railway Southern Railway British Railways Class LSWR: A12 SR: A12 BR: 1MT Nicknames Jubilees Retired 1928–1948 Disposition All scrapped

The A12 locomotives of the London and South Western Railway were built between the years 1887 and 1895 to the design of William Adams. Ninety of the locomotives were built; numbered 527-556 (built at Nine Elms Works); 607-646 (Neilson and Company (although officially known as O4 class); 597-606 and 647-656 (Nine Elms), they were unusual for their time. The wheelbase type (0-4-2) was being built by few of the other railway companies, and were soon being phased out (the Great Northern Railway had 150 such locomotives). They bore the nickname "Jubilees", because the first batch appeared in the Golden Jubilee of Queen Victoria's reign.

All 90 passed to the Southern Railway in 1923. Withdrawals started in 1928, with four of the class surviving to Nationalisation, but all were withdrawn in the first year of British Railways. None of the locomotives were preserved.