Originally Posted by
manda99
I attempted to use my contactless Ventra card last year in London and it wouldn't work. Ventra is the fare card for Chicago Transit, but it's also a contactless Mastercard. I talked to Ventra in advance and they said it would work as long as I loaded money into the MasterCard account on it. Did not work. Ended up buying an Oyster card with the Ventra card.

TFL needs the "opening a tab" type transaction to be available on the card to be compatible with the contactless system - since it pre-authorizes the daily cap amount, but then only takes your actual usage at the end of the day. This "opening a tab" type transaction is typically not allowed on pre-paid MasterCards which i'm assuming this card is classed as. If you cannot use it on the gas pump in the US you wont be able to use it on TFL.