¿Cuáles eran las "Cuatro Grandes" compañías ferroviarias del Reino Unido antes de la nacionalización?
What were the 'Big Four' railway companies in the UK before nationalisation
The Big Four were London, Midland and Scotland (LMS), London and North Eastern Railway (LNER), Great Western Railway (GWR) and Southern Railway (SR)
Los Cuatro Grandes eran London, Midland and Scotland (LMS), London and North Eastern Railway (LNER), Great Western Railway (GWR) y Southern Railway (SR)
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