Michael Hoffman ) gurgled
happily, sounding much like they were saying :

Because if your uncompleted journey started at Amersham but they don't
know where you exited it will be £5.50.

But if the uncompleted journey *finished* in zones A-D...?

Yes, that's why I said *to* zones A-D... Do they turn off the gates in
late evening hours as they do in more inward Met stations (e.g. Pinner)?

What gates?

If so, you get a free trip from zone 6 to Amersham or wherever.

Cool.