Boy, 15, pleads guilty to inciting terrorism by encouraging the murder of Australian police officers

The teenager was 14 at the time of his arrest in April. Credit: PA

Video report by ITV News UK Editor Rohit Kachroo

A 15-year-old British boy has admitted encouraging an Islamic State-inspired plot targeting police officers in Australia.

The Lancashire youngster sent thousands of messages to 18-year-old Sevdet Besim in Australia, who shared his admiration for IS.

In one message the boy, who was 14 at the time, said: "Suggest you break into someone's house and get your first taste of beheading."

Besim replied that it seemed "a little risky".

The plan was to stage the attack at an Anzac Day parade commemorating the Australian and New Zealand Army Corps' WW1 battle in Gallipoli on 25 April.

The teenager, who cannot be named for legal reasons, pleaded guilty to inciting terrorism when he appeared at the Old Bailey via video link from Manchester Crown Court.

He was charged with inciting a person to commit an act of terrorism wholly or partly outside the UK between March 15 and March 26 in 2014.

Police found the messages after he was arrested on April 2.

According to the reports, the alleged plot was uncovered by secret surveillance of Besim - a friend of another teenager, Numan Haider, who was shot dead after being suspected of threatening Australian prime minister Tony Abbott.

Communications allegedly revealed Besim was planning to target police and intelligence officers with firearms and "a massive machete".

The British boy urged him on and suggested videotaping the attack and sending it to an IS recruiter.

A recreation of the chilling message sent by the British teenager. Credit: ITV News

He wrote: "You are a lone wolf, a wolf that begs Allah for forgiveness a wolf that doesn't fear blame of the blamers. I'm (sic) I right?"

Besim allegedly replied: "Pretty much."

The boy also instructed Besim to "start dressing like a Kuffar", and asked if he was "willing for a bullet to go through you".

During another conversation days later, the British boy told Besim not to underestimate the "difficulty of beheading a person" and advised him: "U gotta be a lion especially that ur doing it in public."

A second charge of inciting terrorism overseas in relation to beheading a person in Australia was dropped by the prosecution.

Sentencing was adjourned to September 3, to allow for pre-sentence reports to find out if there was any "indoctrination" in particular.

The boy is currently being held in an unidentified youth detention centre in the north west of England.