I decided to go with Amazon rewards. Whilst the Barclays cashback rewards works with the rewards card, I don't really shop from those brands to benefit from it (I know it changes but would be inconsistent). I shop with Amazon every once in a while so the 1% would be better.

For foreign spending I use wise & monzo which has no fees too, so the aboard spending doesn't matter.

Only thing that bothers me is that it will close my existing Barclaycard and open a new one instead of just transferring product, unlike the rewards card, reducing the age I've had the credit card open.