 In 1908 the up line was diverted under the main line to reduce congestion.Details of this venture were noted in The Railway Magazine in 1908 which referred to the bringing into use of a "new burrowing line".The section of the New Guildford line from London Waterloo to Claygate was the final suburban electrification carried out by the London and South Western Railway, with the first services on 20 November 1916.