Only have to look at Assange to see what happens to you when uncomfortable truths about governments are revealed....
The American Government.
And Assange is mad as a box of frogs.
Closer to home, Mrs T tried to block Spycatcher. A mate bought a copy for me in America (ironically). It is rather dosappointing in terms of sauce but quite a fun read. The idea of banning it was absurd. That sort of censorship has been off the table for quite some time now.
I'd be astonished if Boris thinks that taking on the British news media is a good plan. There are probably dozens of cuckolded male journalists who would like to see Boris' liver on a skewer over a moderate heat.
