Come on now, no need to exaggerate. The UK has limits on free speech, as do most countries ( even the holier than thou US, if I'm not mistaken). You might consider them to be too much, but that doesn't mean there's no right of free speech.
In the example you're quoting, you're aware that the restrictions were on the political wing of what was basically a terrorist organisation ( IRA) with which the UK was in what was basically a (civil) war?