Well it certainly worked fine with my NatWest account and app, clever stuff, BUT (sorry about the but) it was no more simple than just firing up the NatWest app and transferring from there.
This might not be the case for other legacy banks that have poor apps, but NatWest’s isn’t bad recently. If you’re going to implement anything through open banking, I’d rather have a basic other bank account activity feed along side my Monzo ones. Thanks.