Absolute hogwash!
Show me in the history of the UK a single Senior police officer go on the record to describe an active PM as a liar!
Pinch of salt, the day you are responsible for the security and safety of 8 million Londoners, have your numbers slashed, listen to your boss lie and then have idiots say it's not a problem because on a single occasion a team came through, on that day you get to pus stuff under the carpet!
Show me in history an occasion when a police officer has had such an opportunity in a time of austerity and 24/7 media?
The real truth is somewhere bettween the two positions neither pm or police chief can be objective in these circumstances.