Sir Nigel Gresley is considered one of Britain’s most famous locomotive designers with his designs of the Flying Scotsman and the Mallard, which achieved speeds of 126 mph. He was appointed the first CME of London and North Eastern Railway in 1923 and became knighted in 1936. In 1941 he died in office and was succeeded by Edward Thompson.

The Great Western Railway, also known as the GWR, was founded by Royal Assent on 31 August 1835. The idea of a railway from Bristol to London had first been mooted in 1824, and finally in 1833 a committee of four prominent Bristol businessmen, namely George Jones, John Harford, Thomas Richard Guppy and William Tothill, had joined together and provided impetus and capital for the project. It took two years to survey the line and push the necessary legislation through Parliament. The first train ran from Bristol to Bath on 31 August 1940, full services started in 1841 and in 1842 Swindon Locomotive Works started operation. The London terminus of the GWR was at Paddington station. At its inception, the GWR had a board of 24 directors which was divided into two committees based in London and Bristol. The first chairman, who sat on the London committee, was Benjamin Shaw and the first deputy chairman was Robert Bright, a member of the Bristol committee. Sir Daniel Gooch was the first Locomotive Superintendent, a post that came later to be known as the Chief Mechanical Engineer. The GWR did not have the post of General Manager until 1863, when Charles Grierson was appointed. The first Secretary was Charles Saunders. Charles Russell became chairman in 1839. The GWR’s first Engineer (a post that would later be called the Chief Civil Engineer) was the renowned Isambard Kingdom Brunel, and he held the post from March 1835 to September 1859. The GWR was overseen by a Board of Directors. At the turn of the century there were three departments under the General Manager. These were the General Department, New Works and Government Enquiries and Staff and Expenses. On the operational side of the GWR, the various different departments such as the Locomotive, Carriage and Superintendent, the Superintendent of the Line, the Goods Department and the Traffic Manager all used a similar administrative structure. These departments were headed by one manager and beneath this post responsibility was distributed into divisions based on geographical areas, which varied by department. The docks which were owned by the GWR were administrated separately from the railways under the control of the Chief Docks Manager. There were also facilitative administrative departments, as well as Hotels and Catering, Surveyor, Estate Agent, Stores departments and a Road Motor Engineer’s Department which operated the GWR’s road haulage service. Brunel insisted on using a broad gauge track, which caused problems both in the civil engineering projects to build the railway and also during operation. A Gauge Commission had been appointed in 1846 and brought about the Gauge Act of 16 August 1846 which noted the systemic advantages of narrow gauge but did not compel the GWR to convert the full length of their track. From 1846 a standard gauge third rail was added to board gauge lines. From around 1868, led by then Chairman Sir Daniel Gooch, the GWR began to convert the entire system to standard gauge, and this was completed on 23 May 1892. The main line of the Great Western Railway ran over the 118¼ miles between Bristol Temple Meads and Paddington station in London. The construction of the main line required several major engineering works. The chief among these was the two-mile long Box Tunnel between Bath and Chippenham. This challenging engineering work took around five years to complete, opening on 30 June 1841. Brunel also constructed viaducts and bridges, including the Maidenhead Bridge, opened on 1 July 1839 and the Royal Albert Bridge at Saltash which linked Devon and Cornwall across the River Tamar and which opened on 11 April 1859. The GWR had a road haulage operation, which connected with its rail freight services. The GWR also owned and operated a number of docks and harbours, and after the Grouping in 1923 the GWR became the world’s largest dock-owning company. It wholly owned 16 docks, including Plymouth, Swansea and Cardiff, and jointly owned five other docks. The South Wales ports mainly handled minerals and food, whilst passenger ships used Plymouth and Fishguard. The GWR’s docks and harbours allowed goods and passengers to transfer between rail and sea with ease. The GWR also owned its own hotels, which numbered eight by 1923. The showpiece hotel was the Great Western Royal Hotel which was connected to Paddington station. The Railways Act 1921 came into effect on 1 January 1923 and the multitude of smaller railway companies were consolidated in the Big Four. The GWR absorbed seven larger constituent companies as well as 26 smaller railways covering most of Wales, the Welsh Marches, Somerset, South Devon and Cornwall. It was third largest Big Four railway, with around 3,800 miles of track. The Great Western Railway, along with all the other Big Four railway companies was nationalised and taken over by the Railway Executive, part of the British Transport Commission from 1 January 1948. The Western Region of British Railways took over responsibilty for GWR's sphere of operations.

During the First World War the government took control of the railways to co-ordinate the war effort. After the war it was decided that the railway companies could not competitively return to their prior state, and so the 1921 Railways Act merged the 120 existing railway companies into four companies, which became known as the ‘Big Four’’. Founded in 1923, the Southern Railway took over the railways of South-East England and came to consist of five major railway companies and 14 small ones. The Southern Railway had works at Ashford, Brighton, Lancing and Eastleigh. The first chairman of the Southern Railway was Brigadier-General Sir Hugh Drummond. Initially the general managers of the three main constituent companies, namely the London & South Western Railway (LSWR), London, Brighton & South Coast Railway (LBSCR) and South Eastern and Chatham Railway (SECR) worked together to lead the Southern Railway during its first year of operation. From 1 January 1924 it was decided that railway would be led by one general manager and one chief mechanical engineer. The first holders of these posts were Sir Herbert Ashcombe Walker, formerly manager of the LSWR and Richard Maunsell previously the Chief Mechanical Engineer of the SECR. Walker was succeeded by Gilbert Szlumper, then Sir Eustace Missenden and the last general manager prior to nationalisation was Sir John Elliott. The Southern Railway's operating structure was based on geographical divisions, initially these were London (East), London (West), Eastern (Dover) Southern (Brighton), Central (Southampton), and Western (Exeter). The Southern Railway was the smallest of the Big Four, and it relied primarily on passenger traffic. The Southern Railway’s predecessors had begun the process of electrification around suburban London where there was a high volume of passenger traffic. This programme was continued by the Southern Railway and was approved by its first AGM in March 1924. A rolling programme of electrification continued throughout Southern Railway’s operation, and on 30 December 1932 the newly electrified line to Brighton was opened. Despite Southern Railway’s increasing use of electric trains, steam locomotives continued to be used, especially for goods trains, until the nationalisation of the railways in 1948. As well as operating rail traffic, the Southern Railway owned and operated docks and harbours along the South Coast, the most important of which was Southampton Docks. It also ran passenger steamers across the English Channel to France. The Southern Railway operated air services to the Channel Islands from a number of airfields in the South-East and had stations at these airfields to allow passengers to transfer. The 1947 Transport Act nationalised the railways, and the Southern Railway came to be run by the Railway Executive as part of the new British Transport Commission. The Southern Railway’s rail operations were taken over by the Southern Region of British Railways.

Richard Edward Lloyd Maunsell (1868-1944), CBE, was born at Raheny, County Dublin in Ireland. He graduated from Trinity College, Dublin with a Master of Arts and subsequently became a pupil of H. A. Ivatt at the Ichicore Works of the Great Southern and Western Railway (GSWR) in 1988 going on to complete his training under Sir J. Aspinall in Horwich on the Lancashire and Yorkshire Railway. Here he spent some time in the works and drawing office that led to him being appointed as the Locomotive Shed Foreman at Blackpool. In 1894 Maunsell departed for India as the Assistant District Locomotive Superintendent on the Eastern Indian Railway and during the following two years was promoted to District Locomotive Superintendent on the Asansol District. He returned home in January 1896 where he became the Works Manager at the Ichicore Works of the GSWR, moving up to become the Locomotive Engineer in 1911. In late 1913 Maunsell left for the Southern Eastern and Chatham Railway where he was appointed as the Chief Mechanical Engineer. During the First World War Maunsell was frequently called on to advise the War Office regarding maintenance of rolling stock in France, he made several journeys to the war area for this purpose and held the rank of Lieutenant-Colonel in the Engineer and Railway Staff Corps, Territorial Army. In 1918 he was awarded a CBE for his onerous wartime duties. In 1923 he was appointed the Chief Mechanical Engineer for locomotives, carriages, wagons, and road vehicles, of the newly formed Southern Railway. Maunsell was the president of the Institute of Locomotive Engineers in 1916 and 1928, chairman of the Chief Mechanical Engineers’ committee of the Railway Clearing House in 1935 and is a founding member and past member of the Council of the Institute of Transport. After a period of illness, he retired in 1937, and died in his home in Ashford, 1944.