 On 1 July 1933 the MR , along with London 's other underground railways aside from the short Waterloo & City Railway , was taken into public ownership as part of the newly formed London Passenger Transport Board ( LPTB ) . Despite being 44 miles ( 71 km ) from London , Quainton Road became part of the London Underground network . By this time , the lines from Quainton Road to Verney Junction and Brill were in severe decline . Competition from the newer lines and from improving road haulage had drawn away much of the Tramway 's custom in particular , and Brill trains would often run without a single passenger . 
