Guardian gagged

The Guardian believes that it is being gagged from reporting Parliamentary proceedings today.

According to the paper

Today's published Commons order papers contain a question to be answered by a minister later this week. The Guardian is prevented from identifying the MP who has asked the question, what the question is, which minister might answer it, or where the question is to be found.
The Guardian is also forbidden from telling its readers why the paper is prevented – for the first time in memory – from reporting parliament. Legal obstacles, which cannot be identified, involve proceedings, which cannot be mentioned, on behalf of a client who must remain secret.

The paper believes that these legal grounds appear to call into question privileges guaranteeing free speech established under the 1688 Bill of Rights.