In message , at 18:51:18 on
Mon, 14 Dec 2015, Paul Corfield remarked:

It is farcical that the Wimbledon loop timetable constrains the Midland
Main Line, the Brighton Main Line and the East Coast Main Line all the
way to Scotland. Network Rail have to schedule the former first and
slot everything else in around one service. ECML fast services will be
constrained by the Thameslink services once the routes are connected
together.

The Thameslink and EMT trains on the MML are pretty much segregated to
one pair of tracks each. Similarly the GN's that will go through the
core, from East Coast + Kings Lynn fasts which will continue to
terminate at Kings Cross.
--
Roland Perry