.. from Acton Town - Hatton Cross - T4 - T5 and in reverse. and:
.. from Acton Town - Hatton Cross - T123 - T5 and in reverse.

So the 'loop' between T4 and T123 becomes redundant?

I thought it was going to be...

Hatton Cross - T4 - T123 - Hatton Cross (as it is now)
Hatton Cross - T123 - T5 and in reverse

....as the T5 extension was a spur from T123 with no access direct from
the T4 loop, or did they completely change the plan?


And that if you want
to go via tube between 123 and 4, you'llnow have to go via Hatton
Cross
instead!

You already do if you want to use the tube.