The UK's Snooper's Charter imposes a gagging requirement on everyone ordered to snoop on people. This is "the last policy discussion about surveillance before the mass gagging."

"Note that this section is absolute: it does not have exceptions, for example in relation to the public interest: such as the ability to discuss the benefit or downsides of part interception activities; no exception for talking about this to MPs, or other democratic representatives; or even to exculpate anyone who otherwise would be wrongfully found guilty."