@Fetaface
The Home Office commissioned a study of the available data in 2020, external. It said:
"The academic literature highlights significant limitations to what can be said about links between ethnicity and this form of offending."
"Research has found that group-based child sexual exploitation offenders are most commonly white."
"Some studies suggest an over-representation of Black and Asian offenders relative to the demographics of national populations."
It found there was limited research on offender identity and poor quality data, which made it difficult to draw conclusions, however "it is likely that no one community or culture is uniquely predisposed to offending".
A previous piece of research from 2015 found that of 1,231 perpetrators of "group and gang-based child sexual exploitation", 42% were white, 14% were defined as Asian or Asian British and 17% black.
The problem is that the data is from only 19 out of more than 40 police forces and nearly a decade old.
Another issue is that the ethnicity of the offender is recorded by police officers rather than self-assessed, and uses broad definitions, such as "Asian".
https://www.bbc.co.uk/news/uk-65174096
There appears to be more up to date evidence that I'd like to see. According to this report this data is nearly a decade old and only from 19 police forces. The HO said that grooming gangs were commonly white.