You asked
Please provide statistics regarding the known amount of female and male members of gangs each year from 2007 to 2017.
We said
Thank you for your enquiry.
Unfortunately, we do not hold statistics on the number of male or female gang members. By its nature gang membership is a challenging area to collect statistics on but you may find this research report, published by the Home Office, helpful:
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/491802/horr88.pdf
For future reference, you do not need to use a Freedom of Information request to ask for data. You can simply email CrimeStatistics@ons.gov.uk and we will endeavour to help.