Information from 'British Railways Diesel Locomotives', compiled by A Williams and D Percival, 1971. British Railways are providing facilities for road tests of the following locomotive which remains the property of the manufacturer and is not included in B.R. stock. Brush Co-Co introduced 1968 Engines Sulzer 16-cyl. 16LVA24, of 3, 946 h.p. at 1,100 r.p.m. Weight 126 tons, Maximum Tractive Effort 70, 000 lb, Total b.h.p. 4000 Transmission Electric. Six Brush 515 h.p. nose-suspended traction motors. Driving wheel diameter 3' 9 HS4000 Kestrel. The photograph in the publication is captioned Brush diesel-electric No. HS4000 Kestrel [N. E. Preedy].   Information from B. Cheney.