Re: What could possibly...?
Yes that's what I did too and they were happy to do so. No tinfoil hat here but practicality using an Oyster Travelcard trumped contactless. This morning I watched someone try to pay with contactless on their phone but it wasn't working. They didn't have any other means of payment and that caused problems for them and everyone else waiting to pay. It wouldn't have been so bad but for the refusal to accept their phone wasn't working to pay.