I traveled all over England this last year with a Chase Visa. No problem the majority of places, but definitely a few places that were inconvenienced by having

I traveled all over England this last year with a Chase Visa. No problem the majority of places, but definitely a few places that were inconvenienced by having to pull a signature pad out from under a pile of stuff because no one's used it in months, and a few places that asked me to just pay in cash. I would expect London itself to see enough foreign traffic to be more accepting in this regard, though.