TheOneKEA wrote:
snip

But what would replace the Greenford triangle, to allow HSTs to reverse
formation after interesting diversions in the West Country?

I'm sure some alternative could be found. A giant turntable, perhaps...
or setting up some sort of circuit around the Willesden railway lands.

--
Dave Arquati
Imperial College, SW7
www.alwaystouchout.com - Transport projects in London