Paul Abrahams, prosecuting, told a jury of 10 women and two men on Monday that the brothers, from Sheffield, had “systematically groomed a vulnerable young girl” in the city.

Abrahams told the court how the girl performed a sex act on Kamar Ilyas, who had the nickname Nasser, in bushes in Sheffield’s Meersbrook Park when she was 12.

He said the girl, now in her 30s, also performed another sex act on Kamar Ilyas at Heeley City Farm, and he had sex with her in a car while parked in a lane near the Ivory Hotel.

The prosecutor said that at the time the girl had known Kamran Ilyas as “Kammy K” and she had sex with him in the bedroom of a flat where she had been drinking alcohol and smoking cannabis.

Kamran Ilyas had earlier removed her trousers in the living room and started to “show off her body”, Abrahams explained.

According to the prosecutor, the girl said she was 13 years old at the time.

Meanwhile, Abrahams said Kamran Ilyas also had sex with the girl on a bench in Sheffield’s Millennium Park, when she again said she was 13.