"Roland Perry" wrote

So the 16 paths/hr allow for several trains to either stop at Stratford,
or run at relatively low speed to/from the depot?

Trains to the depot will run at linespeed to close to Stratford. The
turnouts to the platform lines and to the depot line allow for fairly high
speeds, and mean that capacity isn't lost in slowing down. In the current
timetable the 1725 St Pancras to Broadstairs calls at Stratford, and while
it is there it is overtaken by the 1727 St Pancras to Brussels and the 1730
St Pancras to Paris,

Peter