We know that sometimes you need to travel outside of the pre-selected Oyster zones that you use for your commute. And of course, you don't want to carry two Oyster cards.
That's why you can add a Pay As You Go balance at any Oyster machine onto your existing CommuterClub Oyster card.
So to cover any charges outside of your included Oyster Zones just top up at the station whenever you need to!
Please do mind your balance! If you travel outside of your zones and your Oyster balance drops in minus, you will not be able to access your annual ticket any longer!