On Mon, 08 Aug 2005 15:41:06 +0100, Barry Salter
wrote:

Strange also that the Chiltern Ruislips, and Greenford, aren't on
there. How is one supposed to travel on a Denham to South Greenford
ticket (if one even exists)? The NR journey planner chokes on such a
request - although it's happy to send you on the tube from South
Ruislip to Greenford if you ask it for Denham to Southall.

That's covered by a different set of rules, relating to
interavailability of National Rail tickets on London Underground
services, and vice versa.

Sorry if I wasn't clear, but the LU journey (cross-London transfer)
I'm talking about is from South Ruislip to Greenford, which isn't
covered in the list of interavailable routes you posted.

For National Rail tickets, those sections are as follows (the first
entry in each case refers to the National Rail section, the latter the
LU/DLR validity):

Any two North London Line stations between Richmond and North Woolwich:
By any reasonable combination of LU/DLR services, but not for exit at
any intermediate LU or DLR station

Interesting... so if you started at Willesden Junction and bought a NR
ticket to Highbury & Islington (£1.30, or 85p with a Railcard), you
could use it on the tube instead? And presumably it would be valid for
interchange from the Circle to the Vic at King's Cross, where you
temporarily leave the station, and could mysteriously disappear during
the interchange?

(A Willesden Jn - KX LU single is normally £2.80)