On 20 Jun 2006 04:40:14 -0700, Neil Williams wrote:

So what about the following example. I live between Woodford and South
Woodford, and feel like a trip round the Circle Line. So I touch in at
Woodford, travel into London and go once round the Circle, then back
out to South Woodford, where I touch out and walk home. Assuming the
time limit for the journey doesn't get in the way, I pay only the
Woodford to South Woodford fare. Is this fare evasion?

It's a bit of a contrived example, but as Oyster charging appears to be
based only on entry and exit points I suppose it is strictly OK. Does
LUL have a concept of permitted/reasonable routes?

I don't believe so...

I've read the OP again and it related to a Travelcard rather than
pre-pay, though, which might change matters, as a TC is for now at
least a traditional zonal ticket.

Well, if it makes a difference, what if you had a Z4 Travelcard season
on the Oyster?

(I don't think it makes a difference, as you're allowed to travel out
of zone on a Travelcard on Oyster, provided you touch in/out, because
the extension will be charged automagically via PAYG.)