On 16 Feb, 17:10, wrote:

This suggests that there is something different about the Shepherds
Bushes whereby they are treated as a single station.

That may be true for oyster but it's not true for paper tickets as
I found out once. I bought a ticket from the LO machine for a
journey to Stansted Airport, which said Shepherds Bush LO
(or something to that effect, possibly "NR") and had a "+" sign.
So I then crossed the road to the tube station to get the central
line. The gate validator didn't let me in, and on showing the ticket
to the man he said that the "+" meant I could use the ticket on
the tube only if I had already got on a real train that started at
Shepherds Bush LO.

I suggested that to abide by the rules I should take a train to
West Brompton and change at Ealing Broadway to get to the
other side of the gate, to which he agreed.

The "+" sign (actually a Maltese Cross, or a dagger, or is it both or
neither?) actually denotes that the ticket can be used for cross-
London transfer by Tube between a designated list of stations, and
Shepherd's Bush is not one of them (though perhaps it should be).

The list of stations is on this page - click on the "show Station
List" link:
http://www.nationalrail.co.uk/times_fares/london/

To comply with the rules you would have needed to go from Shepherd's
Bush on a WLL train and interchange at Kensington Olympia or West
Brompton on to the Underground network.

I think I would have just let you through!

Interesting point about Shepherd's Bush (LO/ WLL) not being on that
list though. Perhaps it will be in the future, indeed perhaps it's
omitted from the present list because no-one was quite sure about when
the station would actually open and amending the list is a lengthy
process.