Since 1977, the Royal Train has included some specially equipped Mark 3 coaches. Mark 3s remain in service as part of HSTs with Great Western Railway and ScotRail much as they have since introduced. These were refurbished when their operators were privatised, with all except East Midlands Trains' receiving new seats between 2006 and 2009.

Originally conceived as locomotive-hauled coaching stock, the first coaches built were for the prototype HST in 1972. Production coaches entered service between 1975 and 1988, and multiple-unit designs based on the Mark 3 bodyshell continued to be built until the early 1990s.

HST Mk3's A complete list of all HST Mk3 coach numbers showing previous, current and conversion numbers

英國鐵路3型客車 （英語：British Rail Mark 3）是 英國鐵路 （一家國營全國性鐵路公司，现已结业）的第三代標準化 鐵路客車。 最初用于20世纪70年代为与公路及航空运输竞争而开发的高速列车。 存在多種座位布局及多個改進型、衍生型號。 “英国铁路3型客车”原本计划用于传统的机辆式列车，但1972年制造第一批车辆被“ 城际125型柴油动车组 （英语：InterCity 125） ”（一型高速动力集中式动车组，面向既有线提速高速列车开发）原型车所用（两者当时均停留在研发阶段） …

Converted from Loco-Hauled Mk3 Coaches for XC & Grand Central. 11/10/23 - Sims Metals, Hull. Bellingham. "The Stannington Pullman" holiday coach, Morpeth. Road from Ely Papworth to Crewe HS in April 2023. Farm at Pymoor, Ely for Farm Office / Summerhouse.

The Mark 3 coaches were of the loco-hauled type, and had to have their couplers and electrical systems modified to make them compatible with Class 43 power cars. Mark 3 coaches also still have a limited role on the WCML as sleeping cars on the overnight Caledonian Sleeper services between Scotland and London Euston.

Converted from loco-hauled Mk3a coaches for Grand Central in 2007 Now transferred to EMR

2007年2月20日 · Since 1977, the Royal Train has used nine specially equipped Mark 3 coaches to transport the British Monarch and other members of the Royal Family. These were built from the original HST prototype vehicles. Grand Central, a new open access operator on the ECML, will use HST sets on its newly inaugurated services between London and Sunderland [1].

2024年3月7日 · English: British Rail 's third design of carriages was designated British Rail Mark 3. There were three sub-divisions; Mark 3, Mark 3A and Mark 3B.

ROMIC Group is pleased to be able to offer, for immediate purchase, a selection of ex-lease Mk3 standard gauge air-conditioned passenger coaches. Built between 1975 and 1988 the Mk3 coach is constructed as a steel monocoque. The coaches were operated initially by British Rail, and latterly by various private operators.