Dave Arquati wrote:
No - it's not technically as Richard said. All that is certain is that
for certain pairs of stations, journeys are defined as using Zone 1 even
if a route avoiding Z1 would be possible. Earl's Court to Notting Hill
Gate is certainly one of those cases. I have also tried Shepherd's Bush
(Central) to Parsons Green, which is also defined as via Zone 1.

But what if touch the platform validator at ealing broadway en-route?