The man arrested over alleged leaks to the media linked to the "plebgate" affair was not one of the officers at Downing Street during the incident in September 2012, the Metropolitan Police said in a statement.
More top news
Nearly £2,000 on beeswax candles and many thousands of pounds on lunches with foreign dignitaries: the Commons Speakers' expenses laid out.
Kenya's world class athletes have told ITV News of their mixed hopes on the country's ability to save the nation's reputation before Rio.
A man who disappeared more than 30 years ago has solved his own missing persons case - after remembering who he is.