"CJC" wrote in message
om...

I guess if Crossrail stops at Turnham Green (I don't see why they have
to build a tunnel, use the NLL I say) the piccadilly will stop there
too.

Agreed. The reason why they have not proceeded with the NLL option is that
it would be a slower line, there are greater problems with conflicts with
NLL and freight services than with the tunnel option, and a couple of level
crossings which can't easily be avoided without tunnels.
--
Richard J.
(to e-mail me, swap uk and yon in address)