Re: I heard...
If I hear that somebody has been released without charge I assume it was because there was no provable case against them and that they are, therefore innocent. That is a basic principle of the English justice system (no "not proven" stuff here), has been for centuries and hopefully, despite the longings of the HO and intelligence services, will continue to be. It applies to everyone. It applies to Tory MPs and donors. It even applies to YOU. And if you think about it a little you'll realise that the reason that it applies to Tory MPs, donors and everyone else is so that it can apply to you. And if you do a little more hard thinking you might realise that that is the most valuable protection you can have under the law.
Meanwhile, those of us who've actually had the job of investigating allegations of criminal behaviour appreciate just how important it is that the subjects of those investigations do go unnamed.