Nigel Pendse wrote:

"Barry Salter" wrote:

As such, you'd be liable to a Penalty Fare if you did Wimbledon -
Farringdon on FCC.

How this would be policed solely through the barriers remains to be
seen, however...

(snip)
The only way that a smart barrier could detect which route was used would be through
journey time -- it would typically (but not always) be much quicker on the Thameslink
route.

I don't think it can be policed through the barriers - and relying on a
time difference wouldnt work as there are x number of variables that
might mean FCC journeys take longer (delays on the route, passenger
misses their train as they're on the wrong platform etc etc).

However as I said elsewhere on this thread my experience is that FCC
are quite keen on on-board ticket inspections - so a passenger could
end up £20 lighter should they try and use Pre-Pay on FCC/Thameslink
from Wimbledon to Farringdon.