A policeman in London appears to have accidentally revealed an arrest plan for WikiLeaks founder Julian Assange, in what UK media have branded an embarrassing slip-up by London's Metropolitan Police.

The photo, snapped by the Press Association news agency and published in several newspapers, shows a clipboard held by a uniformed officer Friday outside the Ecuadorian embassy where Assange has been holed up since June, reports CNN. 

Clearly legible in a zoomed-in view of the clipboard, on a sheet of paper headed "Restricted," are the words: "EQ Embassy brief -- Summary of current position re. Assange. Action required -- Assange to be arrested under all circumstances." It goes on to suggest possible ways in which he could exit the building, such as in a diplomatic bag or vehicle.

The document also appears to warn of the possibilities of "distraction," perhaps by supporters of Assange who have previously rallied outside the central London embassy building.

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