Let's do that. 40 years ago there was an hourly slow train St Pancras alternately to Derby or Nottingham.
The Nottingham trains called Luton, Bedford, Wellingborough, Kettering, Market Harborough, Leicester.
The Derby trains called St Albans, Luton, Bedford, Wellingborough, Kettering, Leicester.
The current timetable benefits people going to and from London, and Corby has obviously gained, but the downside has been a huge loss in direct services between intermediate stations, compared with 40 years ago. For example, Luton to Kettering and Bedford to Leicester now require a change of train, and Luton to Leicester requires two changes. For a lot of people that's not decent regional connectivity, it is a service that shouts out that it is only interested in providing journeys to and from London.