Ignorance of the law is no defence, no one can tell you something is legal when it isn’t and it have any bearing on your responsibility to obey the law.
If that was the case, everyone who broke the law would just say that Geoff told me it was okay.
Bozo is responsible for knowing the laws he started.
Again, please point out which covid law defines how many people can be in a meeting room, for how long, for what purposes, and if cake is allowed or not.
The law was that work gatherings were allowed for reasonable purposes.
Is it reasonable for people who work together, on the same tasks, at the same time, working on sensitive issues, with limited secure IT, to be in the same place?
Is it reasonable for them to have something to eat and drink whilst working there?
Is it reasonable for them, when there, to call in the boss about their work and then wish him happy birthday seeing it’s his birthday?
And is it reasonable, when the guidance is to avoid being within 2m of others for more than 15 minutes, to extricate yourself from the room after 9 minutes?
You also miss the point that Boris has accepted his responsibility for what you call “his ignorance of the law“ by paying the FPN.
He has accepted the rule of law and its consequences. Why can’t you? Oh, that’s right: you are not interested in the law or justice: you just want to hurt people you hate.