On Wed, 27 Jun 2007, Kev wrote:

On Jun 27, 11:18 am, John B wrote:
On Jun 27, 10:07 am, Kev wrote:

So why are there signal failures on the less than 10 years old Jubilee
Line extenstion or the less than 30 year old Jubilee Line or the less
than 50 years old Victoria Line.

Scientifically speaking, when you're talking about complex
electromechanical systems like train signalling, 30 years and 50 years
is Pretty Damn Old.

I notice that you didn't mention the less than 10 year old Jubilee Line
extension.

Oh, that's still being settled in!

tom

--
Science is bound, by the everlasting vow of honour, to face fearlessly
every problem which can be fairly presented to it. -- Lord Kelvin