Scotland Yard threatens to prosecute anyone who publishes leaked diplomatic cables
MPs said this risks turning Britain into a 'police state'
Norman Lamb tells @Telegraph it is a 'slippery slope to a police state that accepts that sort of limitation on the freedom of the press to report'
@IoWBobSeely says it sets a 'dangerous precedent' and urges Met: 'think again'
'Journalists are there to report stories whether or not they are going to be embarrassing to the people who are in them'