In the last full four week period for which data is published (from 9th December 2018 to 5th January 2019): The Cancellations and Significant Lateness (CASL) measure for Northern was 3.5% and since that date to 30th January was running at 1.9%. The Public Performance Measure (PPM) of trains on time delayed by less than five minutes was 82.4% and since that to 30th January was running at 87.4%. Whilst there is clearly much more to do, these represent marked improvements compared with the four weeks immediately preceding the timetable change on 9th December which were 4.9% CASL and 68.5% PPM.