14 on the Ramsey line, with even Foxdale seeing a half dozen trains each day. In 1927, during the "Bus War", the IMR boasted that it ran "100 trains a day at pre-war prices." 1930–1945 In the 1930s, following the integration of train and bus services, the summer train service was trimmed to about a dozen trains each way on all three main routes. This intensive service ran on an entirely single-track system controlled by staff and ticket safeworking, with limited semaphore signalling. As the UK's 1889 Railways Act did not apply on the island, there were no signal interlockings except at Douglas and St John's, though limited interlocking in the form of slot detectors was fitted at passing loops from 1927 onwards. Continuous vacuum brakes were not fitted until 1925–27. In spite of this the railway has seen very few serious accidents (see below). During World War II, the usual winter timetable of seven or eight trains each way a day on all three main routes between 07:00 and 20:00 ran throughout. However, as the number of servicemen on the island increased, additional late trains were run on Fridays and Saturdays: the last arrivals in Port Erin, Peel, and Ramsey were often around midnight. Military requirements led to a large number of special trains being run, some of them in the small hours of the morning, which led to some minor mishaps. Foxdale passenger services ceased in 1940, but the branch was heavily used for spoil trains during the construction of Jurby and Ronaldsway aerodromes. 1945–1959 Traffic levels remained very high in the late 1940s due to petrol rationing, but the 1948 Howden Report foresaw the eventual closure of both the Ramsey and Peel lines, with goods services transferred to road transport. The brief post-war resurgence of the Manx tourist industry kept the trains well filled into the mid-1950s, and postponed the day when significant economies and modernisation would be required. From 1955 onwards usage declined sharply; a million passengers were carried for the last time in 1957. By then the high season schedule had been reduced to seven round trips to Port Erin, and five each on the Peel and Ramsey lines. However individual trains, such as the boat trains, and the 10:35 to Port Erin could load very heavily: 9 carriages and almost 500 passengers on a single train was common in high season. The last re-boilering