Roland Perry wrote:
In message -septem
ber.org, at 21:19:12 on Sun, 31 May 2015, Recliner remarked:

I'd have thought that if HEx ever did run through the Crossrail tunnels,
the Canary Wharf and ExCel branch would be of more interest, which would
suggest running through to Abbey Wood.

Yes, I was misremembering which branch Canary Wharf is on.

Will the Heathrow trains be 2tph from each of the branches, or will
passengers have to change in the core (they'll already have to change somewhere for T5).

I believe it'll be 4tph from Heathrow T4 to Abbey Wood.