A man has admitted a string of sex offences against children.

Archie Stulpa-McCullum admitted sexually assaulting a girl under the age of 13 on August 5, 2015. At the time of the offence he was 17-years-old.

He also admitted inciting a girl under 13 to engage in sexual activity without penetration and two counts of attempting to meet a girl under the age of 16 following grooming.

These three offences took place between May 23 and June 6, 2017, when Stulpa-McCullum, now 20, was over the age of 18 and legally classed as an adult.

He also admitted making indecent photographs of children.

One category B image and two category C images were found on his laptop.

The offences are understood to relate to four different victims.

Stulpa-McCullum, of Abrey Close, Great Bentley, was charged following an investigation by Suffolk Police’s Cybercrime Team.

At the hearing at Ipswich Crown Court yesterday, he also denied two charges of causing a child under the age of 16 to engage in sexual activity by exchanging sexual photographs and images and one charge of making indecent images of children relating to six images on a mobile phone.

The prosecution decided not to pursue a conviction on these charges and they will lie on file.

Stulpa-McCullum suffers from haemophilia, heart and lung problems and several medical reports will have to be compiled for the judge before he is sentenced.

He is in the care of the oncology department at Addenbrooke’s hospital in Cambridge and is undergoing tests on his vital organs over the coming months after some discrepancies were found on his liver and pancreas.

Addressing Stulpa-McCullum in the dock, Judge Martyn Levett said: “I am adjourning sentencing until Monday, December 10.

“If you do not turn up I will set up a warrant for your arrest.

“There are a considerable number of conditions on your bail which say you do not contact certain girls, if you do not abide by these conditions you are liable to be sentenced for breaching your bail terms as well.”

An NSPCC spokesman for the East of England said: “Stulpa-McCallum carried out a predatory campaign of grooming and abuse of young girls for his own sick gratification.

“Sexual abuse can have a devastating impact on young lives and it’s vital that victims of abuse and exploitation know they will be supported when they speak out.

“It’s far too easy for offenders to groom children online which is why the NSPCC’s Wild West Web campaign is calling on the Government to force tech companies to do more to protect children on the internet.”