 Frank Pick , Managing Director of the Underground Group from 1928 and the Chief Executive of the LPTB , aimed to move the network away from freight services and concentrate on the electrification and improvement of the core routes in London . He saw the lines beyond Aylesbury via Quainton Road to Brill and Verney Junction as having little future as financially viable passenger routes . On 1 June 1935 the LPTB gave the required six months ' notice to the O & AT that it intended to terminate operations on the Brill Tramway . 
