In message
,
chunky munky writes

This might be a stupid question - but if the protection is such that
it allows normal services to happen while it's in place, why don't
they just leave it up 24/7?


Because the protection involves shutting off a platform, you would not
be able to handle the peak hour service, Met line every 6 minutes and
Piccadilly every 15 mins to Uxbridge (15 to Ruislip).

At that time of night (2100 isn't it?) the Picc is 20 mins to UXB; but
the point is still the same I guess They most likely just turn one trip
at Ruislip.

In fact I think the Picc is always every 20 mins to UXB other than early
mornings and late nights, the Ruislips increase the service level from
Acton - Rayners. I only have a WTT41 here but it certainly was then and
I've not noticed any serious changes with TT43.
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