Roland Perry wrote:
In message , at 12:08:50 on
Tue, 2 Jun 2015, David Cantrell remarked:

HEx also have plans to run to Reading (and possibly beyond).

Not without rebuilding the junction with the GWML they don't.

Isn't the plan to extend the line beyond T5 and join up with the GWML closer to Slough?

Yes, it's the Heathrow Western Rail Link. Construction is due to start in a
couple of years, with train running in 2022:
https://www.networkrail.co.uk/heathrow/