There's been a generation or two of people who've been lucky to enjoy the proceeds of the ambitions for Chiltern Railways, delivered firstly with Chris Green in Network Southeast Days and then with Adrian Shooter.
He worked with that long franchise at a time when Chiltern Railways were free to identify and exploit the competition - correctly identified *not* as the rival services from Euston but private vehicle transport on the M40. A continuation of this ambition might have seen Marylebone taking a swing at road traffic on the M1 - for some years their web site hosted the following map with a link to a proposed M1/M6 Parkway station.
Mark