GWR-HST+2-BUNDLE Set of 4 GWR TT:120 Class 43 HST & Mk3 CoachesConsists of: 1X TT3023M GWR Class 43 HST Train Pack 1X TT4031 GWR Mk3 Trailer Standard Open 42301 1X TT4040 GWR Mk3 Trailer First 41146 GWR Class 43 HST Train Pack Officially the fastest diesel trains in the world, the InterCity 125 High Speed Trains were introduced by British Rail in 1976, operating 125mph services on the Great Western Main Line and the East Coast Main Line before being introduced to other lines as their use spread. When originally