Analysis: ‘Smoking gun’ claims after this publication told Downing Street that Peter Mandelson had failed security vetting last year Sign up to our free Brexit newsletter for our analysis of the continuing impact of Brexit on the UK Sign up to our free newsletter for the latest analysis on Brexit's impact Sign up to our free newsletter for the latest analysis on Brexit's impact Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy