Not only did the PM announced a new full lockdown in a TV address, as others have already said, but he also specifically gave a gov.uk URL as way to check details and rules.
Huge audience plus that equalled massive traffic spike.
Yet, it seemed that the guidance the PM mentioned wasn't online at the moment that he mentioned it.
Like many, I was hitting F5 repeatedly on this page waiting for a document that didn't seem to be there, eager to know restrictions on various aspects of life. But the /coronavirus page just contained stale advice from December.
Eventually at 8:15pm, somebody found a link to a PDF of the new guidance and posted it on Twitter:
"This has all been done with such crashing urgency that they haven’t even been able to transpose the PDF version of the guidance into the website yet, it is here:"
Huge audience plus that equalled massive traffic spike.