Reporter Mark Daly exposed racism after posing as a police officer

A newly-recruited probationer has also been told they must leave Surrey police for displaying racist behaviour.

The force said on Monday that the special constable was dismissed in June for making a racist joke in front of colleagues.

Assistant Chief Constable of Surrey Police, Vic Towell, said their actions re-affirmed the force's strong stance against racism.

We will take all necessary action to eliminate racism from the force Vic Towell, Assistant Chief Constable, Surrey Police

Surrey Police's announcement follows a BBC documentary exposing racism at a police training college in Cheshire.

Officers from the Greater Manchester, Cheshire and North Wales forces have resigned in the wake of the documentary, which was called The Secret Policeman and was broadcast last week.

The programme was not connected to the incidents in Surrey.

Mr Towell said: "I was shocked and appalled at the behaviour of some of the recruits in the BBC documentary The Secret Policeman.

"Their views and actions have no place whatsoever in our policing service.

"Surrey Police takes a strong line on racial and diversity matters and will not tolerate any inappropriate behaviour.

"We will take all necessary action to eliminate racism from the force."

Surrey Police said they had 46 ethnic minority officers working for them - five more than at the same time last year.

They also said they were one of the first forces in the UK to use a new recruitment process which assessed potential officers on their attitude to diversity.