SR West Country and Battle of Britain classes Tags: Locomotive.The SR West Country and Battle of Britain classes collectively known as Light Pacifics or informally as Spam Cans are air-smoothed 4-6-2 Pacific steam locomotives designed for the Southern Railway by its Chief Mechanical Engineer Oliver Bulleid. thumbnail length (km) 20.4216 active years end year 1951-01-01T00:00:00+02:00 active years start year 1945-01-01T00:00:00+02:00 cylinder count 3 designer Oliver Bulleid, R. G. Jarvis number built 110 rebuilder Eastleigh Works Learn more... Loading...