Originally Posted by WorldLux

But only if there are separate gates. AFAIK Elizabeth line is going to be fully integrated into existing underground stations, hence making it impossible to know if someone traveling from Bond Street to Tottenham Court Road used the Central line or the Elisabeth line.

That said, (and again, I don't really know the station situation for Crossrail at LHR), if they don't mix passengers before they touch out, they could charge differently.