"Dave Arquati" wrote in message
...

Isn't the loop all single track

No, it's double from T123 to Hatton Cross. This was operated as a normal
double track railway before T4 was built, and AFAIK is still operated as
such every night after T4 closes.

--
John Rowland - Spamtrapped
Transport Plans for the London Area, updated 2001
http://www.geocities.com/Athens/Acro...69/tpftla.html
A man's vehicle is a symbol of his manhood.
That's why my vehicle's the Piccadilly Line -
It's the size of a county and it comes every two and a half minutes