[em10fan]

Other than some occasional small restaurants/pubs, and a few small indie shops, its basically accepted everywhere here in Edinburgh, I have a corporate amex and use it for expensing business dinners very often, and supplies from office shops, supermarkets, etc..

[blowski]

I used to have a corporate Amex, and it was a nightmare to use it in London. Even in places that said they accepted it, when I attempted to pay the card reader rejected it. That was about 5 years ago, maybe times have changed - it would be great to see data rather than a mixture of anecdotes.

[david_allison]

Was your card Chip & PIN? Didn't have a problem with my British-issued Amex in London 5 years ago.