If they had managed to get enough clients in the UK, it would have made sense to apply for a UK banking license. If there hadn't been brexit, their banking lic

If they had managed to get enough clients in the UK, it would have made sense to apply for a UK banking license. If there hadn't been brexit, their banking license would have been EU wide, so they'd only have to look at their EU wide user numbers in total. In short, brexit is certainly one of the reasons.