"The estimated full cost [of policing the Ecuadorian embassy] including indirect costs for the [June 2012-October 2014] period would be £9.0m," a Metropolitan Police spokesperson was quoted as saying by the news outlet.
The publication added that the London police spended 11,000 pounds ($16,860) daily for a team of three officers posted at the embassy steps. One officer patrols the entrance, while the other two are on watch to make sure that Assange does not leave the embassy disguised as a visitor.
By the end of last January, the stakeout has been reported to cost the UK taxpayers 2.9 million pounds ($4.4 million at the current exchange rate).
Julian Assange gained notoriety in 2006 with the founding of WikiLeaks, an online trove of secret materials exposing global corruption and wrongdoing. In 2010, the website published 250,000 classified US diplomatic cables in 2010.
To date, Swedish investigators have failed to question Assange on the grounds that it is counterproductive to travel to London to question a suspect.