 The turntable at Quainton Road would be replaced with a junction to the south of the existing turntable to allow through running.The stretch from Quainton Road to Brill would be straightened and improved to main line standards, and Waddesdon Road and Wood Siding stations would close.From Brill, the line would pass in a tunnel through Muswell Hill to the south of Brill, and on via Boarstall before crossing from Buckinghamshire into Oxfordshire at Stanton St. John.