Electrification of the Hastings line was first considered by the SER as early as 1903. Lack of finance meant that no decision had been made by the time World War I broke out in 1914. It was stated in 1921 that electrification was a long-term aim. In the mid-1930s, the Southern Railway, which had been formed from the SER, LBSC, London and South Western Railway (LSWR) and London, Chatham and Dover Railway (LCDR) in 1923 under the Railways Act 1921, electrified a number of lines. The East Coastway line was electrified in 1935, with a depot being built at Ore, East Sussex. In 1937, it was proposed to electrify the line between and St Leonards Warrior Square at a cost of £1,500,000. The scheme was deferred, with another proposal in 1937 costing £1,300,000 also failing to gain favour before World War II broke out. One of the main reasons that electrification was not given the go-ahead was the fact that non-standard rolling stock would be required. The Southern Railway had provided the line with 104 new carriages and six Pullman Cars between 1929 and 1934. Two electric locomotives were ordered in 1937. They were built to the Hastings line loading gauge.