Comment by jon-wood

It really isn't that hard to trigger to them, the UK Sanctions List[0] is huge, and contains quite a lot of broad descriptions that doubtless result in people getting swept up in automated checks of the list. Is your name Ali Khalili? Cool, you're on the sanctions list, because that's literally all the identifying factors provided for an Iranian general. I'm sure once it flags the bank will reasonably quickly take a look at your details and realise you're not in fact an Iranian general, but that will take time, and in the meantime your account has been frozen.

[0] https://docs.fcdo.gov.uk/docs/UK-Sanctions-List.html