score:2
According to TFL.
Visa and V PAY (some cards issued outside the UK aren't accepted)
V PAY cards are accepted but your mileage may vary widely depending on the card
Upvote:1
I have used my ING Meastro card successfully in the London underground system, friends have used their Vpay card, mine did not work but that might be that it was a card so new it had not yet been used in the Netherlands yet. My new ING Vpay card has not yet been used in the Underground.
But not all cards from all banks are reported to work so keep an alternative handy if you have that.