“28. The flaw in the defendants’ argument is illustrated by what the judge went on to say. This was that, if he was to follow the defendants’ line of reasoning on this issue, counsel were unable to assist with how precisely he might resolve the question in the defendants’ favour in circumstances where there was evidence from which a jury could properly find that a defendant went beyond mere expressions of belief and opinions, and invited support for a criminal organisation which Parliament had proscribed because it had felt it necessary to do so in order to protect the public. He found it difficult to envisage any circumstances save those that were de minimis where a prosecution in such circumstances would be disproportionate. We would add that counsel had precisely the same difficulty in assisting us on this point as they had before the judge.”