The fourth customer was Merthyr Tydfil Transport, another all single-deck fleet, like Hartlepool, no Fleetlines were operated. The fleet consisted of East Lancs-bodied Leopards, Bristol REs with East Lancs and Eastern Coach Works bodies, Leyland Nationals and a batch of Metro-Scanias. Hartlepools single-deck Dominators had its first East Lancs bodies, Merthyr Tydfil's their first Marshall bodies. Their six (coded SD116) had single-door 50 seat Camair 80 coachwork. Like Hartlepool Leyland National 2s followed. Later in life, these buses were sold to the City of Chester, whose General Manager had previously worked at Darlington.