Political blogger Paul Staines, who runs the order-order website under the name Guido Fawkes, has been summoned to appear before the Leveson Inquiry into press standards after evidence from former Number 10 communications chief Alastair Campbell was leaked online.

Campbell submitted papers containing a string of potentially damaging claims to lawyers ahead of his appearance before Lord Justice Leveson next week.

But a link to the 16-page document last night appeared on the order-order website.

Read more at the Press Gazette.