A former police officer who kept a sickening stash of animal porn on his iPhone, including one of a child and a donkey, has been jailed.

Ernest Ewa, 38, showed off the lewd pictures of sexual acts with horses, donkeys and dogs to students who were training alongside him to become police officers at the University of Westminster in Marylebone in an ‘attempt at humour’.

Southwark Crown Court heard he was reported to police in August last year and a search of his mobile phone revealed he had a collection of 11 illegal images including the indecent one featuring a child.

Ewa claimed that he was sent a link to the indecent images over Whatsapp while training to be a police officer.

The court heard he repeatedly showed the gross images to students.

He admitted six charges of possessing extreme pornographic images and four charges of publishing obscene articles on or before August 12 last year.

He denied possessing one indecent image of a child with a donkey, claiming the photo was not of a minor, but he was convicted.

Sentencing him to four months in jail, Judge Stephen Robbins said: “This court has to have regard to public revulsion at these types of offences.”

Ewa, from Ashford in Kent, was jailed for four months for possessing an indecent image of a child and three months for the remaining 10 offences to run concurrently to each other and the longer four month term.

None of the offences occurred while he was on duty and he was sacked by the Met last month.