I think both Visa and Mastercard are increasing their fees like that, but only for payments between the UK and EU (and pretty much simultaneously too - aren't duopolies great?)

Huh, so the UK hasn't kept that law when leaving the EU? That's an odd decision!

They have, but it only applies in the same jurisdiction. So it still applies to intra-UK transactions and to intra-EU transactions. But not to transactions between the two.

Ah, that makes sense. Annoying, but makes sense.

FWIW It's also 1.5% between Switzerland and the EU.

But that EU limit is for debit cards right? And Amazon is excluding the credit cards while still accepting visa debit.

Unfortunately the UK is no longer in the EU.

It's for both. 0.2% for debit, 0.3% for credit iirc.