It was initially a South Wales & West shadow franchise operation that carried over from Regional Railways days and continued when Prism Rail won the franchise in October 1996, it becoming Wales & West. Basically a Class 37-powered diagram on the Cardiff-Bristol Temple Meads-Weymouth route with extensions from Cardiff to Birmingham New Street and Manchester Piccadilly depending on the day. It was booked for haulage by a Transrail Class 37/4 although substitutions by a Class 37/0 were not unknown while the coaches were provided by a then embryonic West Coast Railways.
Eight Mk.2b/c were provided with TSOs 5463/87 & 5569 and BSO 9448 in BR maroon while TSOs 5453/78/91 and BSO 9440 carried the dark blue South Wales & West livery. In addition, three maroon-liveried Mk.1 TSOs, 99318/27/28, were initially provided in the spring of 1996 while some of the Mk.2s were being prepared for service. Normally ran in four-coach sets but these could be lengthened as required with both five and six coaches being noted on occasions. With the two liveries evenly split on the Mk.2s, mixed rakes of both was a standard occurrence.
The trains continued to operate during 1997 and 1998 to a largely unchanged route and formation, although with the acquisition of Transrail by EWS in 1996, Class 37/4s in maroon/gold were soon appearing. A DMU cascade in the autumn of 1999 saw the loco-hauled workings end that September.