MIG wrote
On Aug 8, 3:26 pm, John B wrote:

Correct.

For the benefit of anyone who is not a long-time London resident and
therefore doesn't know the arcana of surface London transport, such
as
possibly the OP, this is because 1) all Travelcards [irrespective of
zone] are valid on all London buses at all times 2) some London
buses,
including the 96, go beyond the Greater London boundary.

Quite how the unsuspecting tourist is supposed to understand this,
I'm
not sure...

Particularly when on some routes travelcards cease being valid at
points which are completely unrelated to the London boundary (although
never within it). I thought that they covered the whole 96 to
Bluewater, but wasn't 100%.

For English speaking 'unsuspecting tourists' and others the information
is in

http://www.tfl.gov.uk/assets/downloa...ets-and-PAYG-o
n-buses-outside-London2007.pdf

Which is rather easier to find than other esoteric Oyster information
discussed here such as out-of-station interchanges.

As far as I can tell, travelcards and PAYG are in fact valid for the
full length of all Tfl bus routes.

Tfl doesn't mention anything about validity on non-Tfl routes that
start within the zones. The examples of which I am aware have validity
stopping at or very close to the zone boundary but 'unsuspecting
tourists' might well be unaware that 216 and 411 count as Tfl and 218
and 461 do not.

--
Mike D