Hi Mike. Right, I see (I think!) But surely, if touching a pink reader shows you’ve only used TFL services then touching one at CW and then touching out at DH proves that and the cheaper fare should apply. There are some journeys where the single fare finder gives you two or three different routes where touching the pink reader will get you the cheaper fare, so I don’t understand why there’s only one way of getting the cheaper fare to DH (via Clapham North and Clapham HS).