On 15 Jan, 01:50, MIG wrote:

On Jan 14, 5:41*pm, Mizter T wrote:

On 14 Jan, 14:16, wrote:

(snip bit about touching-in on a bus to cancel an outerchange)

Also, it only works for me because I have a travelcard, and because
there is a bus station between the two real stations at SB. I wonder
if ticket offices can force a journey to be completed, possibly by
selling some kind of zero-priced "null oyster journey".

I think you would be met with total blank stares at a ticket office if
you tried to ask for that! I dare say there might be some obscure way
of doing this via an Oyster terminal in a ticket office but it's
nothing I've ever heard of before.

It doesn't really answer this question, but I was a bit nervous when
topping up my Oyster during an outerchange (at a machine), but it
didn't cancel the outerchange.


No, it doesn't thankfully - I've also done this a couple of times at
least with no ill effect.