To those having issues logging in due to 2FA issues - I'm using the Firefox browser, on a Mac, on the UK website.
I never get asked for 2FA codes (Even after clearing cookies or using a private/incognito window so nothing to do with cookies or anything like that)
If I use Safari I get asked for the "prove your a human" captcha, not on Firefox though
If I use windows I get asked for a 2FA code
All very bizarre