Why are you surprised? Do you not follow the news?
That there would be an announcement today deciding whether we stay Level 4 or move to Level 3 on Wednesday 11:59pm was communicated well in advance - early last week IIRC. At that stage businesses and media commentators were saying they needed information and certainty on when they could get back to work, and the government said they needed as much information as possible to make an announcement but still give enough notice. It may be that they decide Level 4 will extend further, and they may decide there will be another announcement before leaving Level 4 then.