Nobody in the UK cares about "criticism of the government". That's a paranoid concept that only makes sense in a presidential system like the US.
In Westminster systems you can kick out the government all you want and often do. The point of the constitutional monarchy is to separate the people you "shouldn't criticize" from the people who actually have any power.
The reason they're doing this is that British people hate themselves, hate their children, and the purpose of the country is to take everyone's money and give it to pensioners.