Fake "Apple" System Notifications

Hi

I have started getting fake , phishing style system notifications at the top right of my screen. They look like they are meant to be from Apple, and are mainly about security alerts, and click bait type notifications which take me to some random websites where they want me to download a false Adobe update. They are obviously not from Apple and I haven't downloaded anything recently. (Nothing outside the app store anyway).

I ran Malwarebytes and it found nothing, and can't see anything in the Notifications settings which could be the cause. They don't need a browser to be open to pop up either.

Can anyone help me or advise on where to look to see what bug might be causing these annoying pop ups?

Thank you !