"Martin Petrov" wrote

I see - thanks - I'm surprised that the plan is to mix and match the
Crossrail and non-Crossrail services on the same tracks - though I'm not
sure what I thought would happen east of Stratford, so I suppose they
have to merge somewhere....will the same thing happen west of Paddington?

There are currently around 17 tph in the peak on the GE Electric (Slow)
Line. As the current Crossrail plan is to send half the 24 tph to Abbey Wood
Crossrail will not provide enough capacity to Shenfield, so a proportion of
the peak service will run to/from Liverpool Street Main Line.

The current proposal is to run some Relief Line trains out of Paddington
Main Line. However, if as is likely the Crossrail service is extended to
Reading I can't see a need for trains from Paddington Main Line along the
Relief Lines, though I would expect some peak trains to run fast on the Main
Lines and cross to the Reliefs to call at Maidenhead and/or Twyford.

There will be freight on the GW Relief Lines, and a diveunder will be
provided west of Acton for them.

Peter