opening of several halts at locations on the coastal branches where housing development had taken place since the opening of the line. The line to Worthing was selected for early adoption of this system, and a new halt was called Dyke Junction Halt, close to the point of divergence of the Dyke branch. The halt was opened on 11 September 1905. The railmotors operated on the Dyke Branch. Passengers complained about the railmotor unit due to the vibration from the engine; and it was said to be dirty, because it was kept in the loco shed and not the carriage shed. Overcrowding was also a problem, because the railmotor engine unit was not powerful enough to convey a second coach at busy times. Wartime suspension Operation on the line was suspended as a war emergency measure at the beginning of 1917, and was not resumed until 26 July 1920. Grouping of the railways On 22 July 1924 the Brighton and Dyke Railway company was incorporated into the Southern Railway as part of the process called the Grouping of the railways, following the Railways Act 1922. Sentinel railcar In 1932 a lightweight Sentinel-Cammell railbus was tried out on the line. Sentinel railcar no. 6 had wooden wheel centres to reduce noise but this created problems with track circuit operation on the main line and necessitated the provision of lorry-type brake drums. Rowan Halt A second halt on the branch was brought into use on 12 January 1934 to serve housing developments near the coast. It was named Rowan Halt and was the terminating point for about half the motor trains in the final winters of the line. Angus train control system An Australian engineer, A R Angus, developed a system of train control that would intervene in the event of an engine driver failing to respond to an adverse signal. In 1912 and 1913 he arranged for a demonstration of his system on the West Somerset Mineral Railway, but World War I prevented development of the system. After the war, he negotiated to install it on the Dyke Railway. A demonstration was arranged in the presence of Col Pringle of the Board of Trade on 22 September 1921. Two Terrier locomotives were fitted, and one was driven under steam into the section occupied by the other. The apparatus sounded the engine whistle, and when the driver failed to respond, the brakes