May I invite my hon. Friend to join me in the near future for a journey on the Chiltern line through my Constituency, which would enable him to appreciate at first hand both the success of Chiltern Railway in attracting ever more passengers to use its service and the need to encourage Railtrack to work with the company to provide a dual track on the stretch of line north of Princes Risborough in my constituency, which would both benefit commuters travelling from Buckinghamshire and allow for much faster journeys along the Chiltern line between London and Birmingham?