As of late September 2026, I'm not aware of a confirmed deal closing between Monzo and Nubank, though there's been plenty of chatter about it over the past while. These kinds of talks can drag on for months or even years, and sometimes they just fizzle out. The valuations you see thrown around in the media aren't always what actually ends up happening either - there's a lot of negotiation that goes on behind closed doors. Without an official announcement, it's honestly hard to say whether this is actually moving forward or just speculation.
If it did go through, the big question for UK users would be whether Nubank wants to keep Monzo operating as a separate brand or fold it into their own operations. Usually when larger fintech companies acquire smaller ones in different markets, they keep the local brand going because there's already customer loyalty and brand recognition there. That said, you might see some backend integration, shared features, or changes to how things work down the line. But those kinds of changes typically happen gradually rather than overnight, so existing features aren't usually yanked away immediately.
Best move is just to keep an eye on Monzo's official channels for any real announcements. Until something's actually confirmed, everything else is just corporate gossip.