143606 - 55647 & 55672 - Class 143 Driving Motor Second & Driving Motor Second Lavatory

Home Railway	Llanelli & Mynydd Mawr Railway	Location History	Llanelli & Mynydd Mawr Railway Jun 21-Present
Current Location	Llanelli & Mynydd Mawr Railway
Current Status	Stored
Current Livery	Arriva (with additional advert panels)
TRA Designation	4
Owner
Website	facebook.com/swrailcargroup
Record Last Updated	15 February 2026
Preservation Modifications None
Preservation Information 143606 was the third Class 143 to be preserved, and the first of the ex-Arriva spec examples. This group of sets were the very last 14X "Pacer" vehicles to survive on the national network. 143606 was moved by road very shortly after finishing mainline service to the Llanelli & Mynydd Mawr Railway, not far from its regular commercial sphere of operation, joining 142006. In August 2021 143606 made its preservation passenger debut when it operated at the line's "Keeping the Pace(r)" gala event. It ran in a 4-car set with 142006 and also undertook a demonstration 6-car run with 143607. By the end of 2021, 143606 was being started up regularly, however there were now doubts over which of the two Class 143's on the railway would be kept operating and which was to be made static (the plan originally was for 143606 to be the operational one). Despite 143606 being originally mooted as the set being taken forwards in an operational capacity, the set was subsequently taken out of passenger service and stored to provide spare parts for other sets on the line. 143606 continues to be stored as a spares donor.
Future Plans To continue to provide spares for the LMMR Pacer fleet.

	143606 stored out of service, 21/7/25. Ken Jones

	143606 leads a demonstration 6-car formation (with 142006 & 143607) during its preservation passenger debut, at the "Keeping the Pace(r)" gala event, 28/8/21. South Wales Railcar Group