If I get a 7 day zone 1-2 Travelcard (on my Oyster Card), and I travel to say....Kew or some other 3+ zone, I assume when I get to the destination, they will have me pay 1.50 or 2 pounds (the oyster rate) when I get there? Vs charging some other fare ? Is there an advantage to using the Oyster Travelcard on the days I travel to those zones? Or do you really end up paying the same as you would have if you'd just started with a regular Oyster card within zone 1-2 (not a travelcard on the Oyster).
Cheers!