British Westinghouse 4wPE
From Festipedia, hosted by the FR Heritage Group
British Westinghouse, of Trafford Park, Manchester, received an order from the War Department for one hundred 4wPE locomotives in 1916, to be used on military service in France. The first three, numbered 2001 to 2003, were assembled by Nasmyth Wilson at Patricroft and delivered to Dinas Junction for testing in February 1917. Following the successful tests, it is believed they were sent to the Army's Longmoor Depot in Hampshire.
(Reference : Light Railways of the First World War - WJK Davies)