"Roland Perry" wrote

But you would need to fins somewhere to stable the E* units that currently
lurk there for what must be hours on end (just because they can).

It was paths to/from/into a depot - presumably Stratford. Unlike Brussels
and Paris there aren't any sidings close to the terminal station.

Say 20 paths per hour between St Pancras and Stratford. Knock a few off for
conflicts in the station throat leaving say 16 usable paths. Off-peak 6-8
international, 4 domestic high speed, leaving 4-6 available for ecs to/from
Stratford. Few if any peak-direction ecs paths, but they wouldn't be needed,
only paths to bring in ecs from Stratford in the evening peak, or take ecs
out to Stratford in the morning peak.

Peter