Re: Meanwhile in London...
But masquerading as a factual site: the only clue to its political origin is that Shaun Bailey's name appears in the footer and his address given as "4 Matthew Parker Street" - aka Conservative Party HQ. No party branding appears on it anywhere, only the minimum identification required by law is present.
I can't see how you could have an arbiter of fact for political messaging, so the only other proportionate safeguards would be clear labelling and transparency of funding. If the party of government is not prepared even to label its own messaging clearly, then there is no hope of any protection from "fake news".