Our starting point is the great amalgamation, the Grouping, of the Victorian companies in 1923 to form the "Big Four" railways: the Great Western, the Southern, the London, Midland and Scottish and the London and North Eastern.
Using unique archive film of the late 1920s, we first examine the stock inherited from the constituent companies.
We then look at the first new types introduced by the "Big Four".
Many rare scenes are included for the first time on DVD, and locomotives shown include, along with many others, Great Western 'Dukes', 'Dean Goods', 'Aberdares', 'Counties', 'County Tanks' and 'Metro' Tanks; Southern 'Ds', 'M7s', 'Lord Nelsons' and Beattie well tanks; LMS ex-LNWR 4-4-0s and 2-6-2Ts, Midland #2Ps' and ex-GSWR Baltics tanks; LNER ex-Great Central 4-6-0s, Atlantics and 'A1' Pacifics.
Many pre-grouping liveries are also seen.