On Wed, 12 Aug 2015 21:01:12 +0100, Barry Salter
wrote:

On 11/08/2015 15:33, Basil Jet wrote:

What use is a diversionary route that only a fraction of the drivers
have the route knowledge for?

Bearing in mind that, to keep the route on their card, a driver needs to
drive over it at *least* every six months,

Drive over it or travel in the cab ?

and Chiltern run over it
approximately 260 days a year, that gives a theoretical maximum of 130
drivers who can sign it...assuming you have a different driver every day.

Chiltern has approximately 300 drivers, so short of running two or three
trains a day to/from Paddington (which there isn't the stock for, let
alone paths), it's impossible for the entire complement to sign the route.

With the route being limited to two trains per hour each way due to the
single line, it's just as easy to change drivers at West Ruislip and
implement stepping back.

Cheers,

Barry