Work was carried out under the auspices of Harry Townley, the works engineer who had trained at Crewe works and therefore fully familiar with railway work. Structurally the large apertures through which the cylinder/valve chests had been mounted were filled, the motion brackets cut off, driving axle crankpins shortened and sleeved, and a SCG RF25 gearbox installed on the rear axle.A conversation with Derek Burton, himself a key player in the RS8 conversion, revealed the names of some of the others involved. They being Cliff Goddard, John Hutchinson, Bobby Howe and Bill Weston.ICI were collaborating with ERF at Sandbach on the production of 8 tractor units to haul 50 ton tipper trailers within the quarry. The power unit for these, a Rolls-Royce C6NFL engine of about 150-175bhp, was mated to a Twin Disc CO 100000 converter. The CO, unlike the more common CF, incorporated a freewheel device so the drive would disengage itself if the machine tried to run faster than the converter output speed. A ninth power unit was ordered for incorporation in RS8, further adding to its uniqueness.The superstructure attracts the most comment. The small, box-like cab features throttle and brake levers at each corner. It is no taller than normal rolling stock (else it would not fit under loading hoppers!) but being proud of the running plate level, and having a sloping casing section forwards, gave driver visibility far superior to most manufacturers products at the time. It was envisaged that the driver would be alone in the cab to prevent his being distracted, but able to drive at any corner. When working under hoppers, there was the risk of the cab rear access encountering stone falling, and to protect it, an unusual covered walkway was incorporated. Following the death of a shunter when he was outside the line of a loco and struck a wagon on an adjacent track, recesses for the shunters were provided at each corner - a feature Sentinel were starting to incorporate at the same time.RS8 continued until superseded in the 70s by modern industrials like Cheedale (RS233), when it went for preservation at Dinting.
In 1959 RS8 was taken into South Central Workshops at Tunstead and emerged as an 0-4-0DH.