I received the email about upcoming 'security enhancements' a few days ago. I did as advised: logged in and verified that my contact details (email and mobile) were all correct. Fine. I was able to carry on logging in, without setting up 2FA. But now (as of a few minutes ago), I can't log on at all: Sorry, we don't recognise those details. Please check and try again.

I tried logging in with my A/C number (which has worked for the past 10 years or so) and also with my email address - no joy, either way.

I'm assuming a temporary database glitch but I've requested an email to reset my password. Note that I was never presented with any options to set up my new credentials.

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Update: Now, the error message has changed to, "Sorry, something went wrong. Please try again or contact us." So, probably just wait a while ...