For anyone in the UK, you can sign up for email alerts from the GOV.uk website. See below for details.
You can also sign up for email alerts from the Gov.uk website. There are daily updates with the facts virtually every day at the minute. Search Google for “Gov.uk” then when in their website search for “Greece travel”. When that page of options comes up, the top answer should be “Greece travel advice”. Click on that to go through to the main page where there is an option to sign up for email alerts. As anything changes, you get an email alert. It’s really simple. The latest one was today and contained all the official info on the cafes bars etc.