Barry Salter wrote:
On 06/08/2015 00:44, Recliner wrote:

It arrives empty, presumably from Marylebone or Wembley, at the down
platform 3 at South Ruislip. I assume the Chiltern drivers all take turns
on this service after bringing in a peak train to Marylebone, so they have
up-to-date route knowledge.

Runs empty from Wembley LMD to South Ruislip as 5V35, forms 2V35 to
Paddington, 2M30 back to West Ruislip, then 5H43 back to Marylebone,
though that's only part of the unit's diagram for the day.

The trains in question are only worked by Aylesbury drivers, and I
believe they need a Guard as well.

Yes, there was a guard. All he did was to walk through the train just
before departure on each leg to check that we all knew where it was going.
Everyone did -- that's why we were on it.