Just a thought.

As the Victoria Line is closed tomorrow, what is the situation
regarding people with Oyster PAYG and getting on a replacement bus? Do
you have to touch in on the bus, and if when you do get on the tube
does the system recognise it as one throught journey.

Suppose I wanted to go from Walthamstow to Victoria tomorrow. I could
touch in on the replacement bus, but would it deduct a fare, and if so
would it be the bus fare or the tube fare? When I get on the tube at
Manor House, would the system treat this as two journeys Walthamstow -
Manor House and Manor House - Victoria, or just one journey
Walthamstow - Victoria?