A DAMNING review into rape gangs will directly link illegal migration with the exploitation of British girls, The Sun can reveal.

The Home Office is expected to publish the long-awaited National Audit on Group-Based Child Sexual Exploitation and Abuse next week.

A source familiar with the report said its author, Baroness Louise Casey, specifically links illegal migration with the violence perpetrated against vulnerable girls.

The Sun understands there are fears in the Home Office that knowledge of the link between undocumented arrivals and grooming gangs could trigger more civil unrest.

The Home Office today refused to deny the involvement of illegal migration in the Casey report.

A government spokesperson said: “Nothing is more important than protecting vulnerable children, and we are determined to crack down on vile grooming gangs once and for all.

“That’s why we ordered a rapid national audit to uncover the true scale of this horrific abuse.

“This report – alongside our response – will be published shortly.”

The Casey review was tasked with building a “national picture of what is known about current group-based child sexual exploitation” and to “identify local and national trends”.

It will also “provide an assessment of what is known about the demographics of grooming gangs and their victims, including ethnicity”.

It comes as a grooming gang have been found guilty of raping and abusing two teen girls in Rochdale in a five-year reign of terror.

The seven men “passed” the victims around for sex and preyed on them in squalid flats and car parks in the town.

They groomed the girls from the age of 13 and made them their “sex slaves” by plying them with gifts, including alcohol and drugs.

The victims both had “deeply troubled home lives”, which meant they were easy prey for the fiends.

During a five-year horror ordeal, the girls were expected to have sex “whenever and wherever” the defendants and other men wanted.

As well as flats and car parks, the predators abused the teens on rancid mattresses, in cars, alleyways and disused warehouses.

Mohammed Zahid, 64, Kasir Bashir, 50, Mushtaq Ahmed, 66, Roheez Khan, 39, Mohammed Shahzad, 43, Nisar Hussain, 43, and Naheem Akram, 48, were today convicted.

Three of the abusers, Zahid, Ahmed and Bashir were born in Pakistan and worked as stallholders on Rochdale’s indoor market.

Father-of-three Zahid – known as Boss Man – gave free underwear from his lingerie stall to both victims.

He was previously jailed for five years after he engaged in sexual activity in 2006 with a 15-year-old girl who he met when she visited his stall to buy tights for school.