On Fri, 11 Nov 2011 22:36:54 -0000, "Paul Scott"
wrote:
Not an insurmountable issue though, as seen on the Bakerloo and
District,
and the new S stock has apparently been built to allow use on the
raised
third rail supply voltage that NR are about to provide around
London...

The difference is the infrastructure, not the trains. The Bakerloo
"shared" bit is +660 outer, 0 inner, so works for both. The Tube
proper including the Met is +440 outer, -220 inner, so no good for
third rail EMUs. Or something like that.

Neil

--
Neil Williams, Milton Keynes, UK