Natwest Bank UK blocked Kraken cex deposit

I was wondering what the UK customers are using for on ramping. I never had issues with natwest until today when trying to send under £500, I got a text and it was rejected. It looks like this is going to be the case from now on.

This is what I got :

Hi xxxxx, to keep your money safe and secure, we have rejected your payment of £xxxdx to your selected cryptocurrency provider. Funds have not left your account and future payments may be restricted. You can find out more information on why we have rejected your payment here.

It's getting hard to on ramp from UK banks these days.

Thanks