Nothing is impossible, the impossible just takes a little while. A relatively typical practices for the ex-USSR, namely controlling the media and profiling the journalists including the readers, seem to have been going on in London during the same period as well. According to the Sunday Telegraph, the BBC let intelligence agents vet staff :
"Confidential papers obtained by the Sunday Telegraph reveal that the British Broadcasting Corp. allowed intelligence agents to investigate the backgrounds and political affiliations of thousands of its employees, including newsreaders, reporters and continuity announcers. The files, which shed light on the BBC's hitherto secret links with the counter-espionage service known as MI5, show that at one stage it was responsible for vetting 6,300 BBC posts -- almost a third of the total work force. The procedure was phased out in the late 1980s. The files also show that the corporation maintained a list of "subversive organizations" and that evidence of certain kinds of political activity could be a bar to appointment or promotion."
If you can spell the name of the party while sleeping, and have subscribed to its periodical propaganda, only then you have the chance to unleash your career potential. I guess what they were worried about was an undercover Red reporter, taking advantage of live events and directly broadcasting a subvertive message -- remember when a guy invaded Truman's world in the "Truman show", and tried to warn the little kid he's on TV all the time? The interesting part is how even the spouses of applicants were subject to scrutiny.
There you go with the freedom of the press, I guess China must have had something in mind when blocking access to the BBC's web site.