On Jun 8, 3:51*pm, Mizter T wrote:
That particular scenario doesn't make a lot of sense to me - I'm
pretty certain that the standalone validators at Finsbury Park are set
up as 'interchange validators', in other words they do not
definitively finish a journey but allow it to be continued [1]. Also
at FP, there's no explicit OSI shown on the official list of OSIs
obtained from TfL - so there's no need to touch-out and then touch-in
again.

It was one of the validators in the NR interchange tunnel, I believe.

So I don't quite know what's gone on there - was she perhaps making a
very long journey that had 'timed out' by the time she reached
Walthamstow? Any idea what the origin station was?

Origin station was King's Cross Suburban, there is no chance at all of
a time-out.

--
Abi