What if they were drinking buddies though and had known each other since childhood or somesuch?

Is there a rule that says a criminal defence solicitor can never be in a social setting with a Police Officer?

The magistrate said that the CPS and police had made a mockery of the legal system and that he was striking the case off. CPS solicitor was reprimanded verbally. I was awarded costs of 300 pounds. Lasted about 5 mins after that.