However, a sort code is always presented as 12-34-56 and the account number normally shown as 1234-5678 - so it's easily chunked and very easy to remember.

You also rarely need it among groups primarily using Monzo - which among my UK friend group is universal. Just pick from contacts, just like Apple Cash.

I've also found paying strangers on Monzo to be ridiculously easy, you both turn on bluetooth and go to "pay nearby" screen. You just ask them "Are you <full name>?" to verify, then send money.

While very true, I think the point is that if you come across someone not using Monzo as their bank it’s almost just as easy to send them money.