Roland Perry wrote:
In message -septemb
er.org, at 15:18:47 on Mon, 26 Jan 2015, Recliner remarked:

Crossrail will serve all except T5. HEx will presumably continue to serve all except T4.

Which will give HEx an advantage with BA pax.

The way they've served the three terminals [treating 123 as a single
point] with one through train and a shuttle has always been a dogs
dinner. BA probably has the clout to get BAA run the direct train to
whichever of T4/5 they are using this week (so to speak).

BA is fixed in T5 and T3, with a few remaining flights still in T1, soon to
be transferred.

The Crossrail trains will be 4tph, so there's a possibility they could
interleave them to both termini, and have a 4tph service from each;
half-and-half. With judicious timing you could perhaps offer an easy
change at 123 from a Crossrail train to a HEx not far behind (from the
'other' terminus). That would of course require HEx to be able to
overtake the Crossrail train.

As it should, as it'll be running non-stop on the main line, with Crossrail
on the relief line. I don't think there's then a grade-separated route
from the mains to the Crossrail tunnel, so HEx will have to remain a
Paddington-only service.