The Office of Rail Regulation shows quarterly and annual punctuality data (the Public Performance Measure) for each operator in its National Rail Trends publication. A link to the website is as follows:
Information on the punctuality of each route serving London is not held by the Department for Transport. Network Rail is responsible for performance data for the rail industry. The hon. Member may wish to contact Network Rail’s chief executive at the following address for such information:
90 York Way
London, N1 9AG.