[timnash]

The requirements for an Amex are not that high at least in the UK for their basic card.

[mmahemoff]

I think they still take a larger percentage though, so probably only worth accepting for higher-value transactions.

[petercooper]

Almost everywhere I go here in the UK accepts it (petrol station, supermarket, etc.) It tends to be small merchants who don't (local takeaways, particularly.)