I know that the whole POINT of their being such a long distance with the
'loop' between 4 and 1,2,3 at the moment is that it was done deliberately
with T5 expansion in mind, so that they wouldn't have to build any 'spur'
branches .. But T5 has now been sited not where it was thought to be, hence
having to build a spur for T5! So the annoying thing is that all this time,
the distance between 4 and 1,2,3 could have been much shorter!

According to the PDF on the TFL website (which just says "2003" and is no
more specific than that), trains will run as:

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

Geoff.

Are they still persuing with the idea that half the trains will go to
T5 and half will go as usual? I know there's a valid reason for this
(different T5 location than planned so now they can't build a feasible
loop I believe), however there's gonna be a load of lost passengers
along the branch when the time comes.