Look at the MoJ data here:
www.gov.uk/government/statistics/criminal-justice-system-statistics-quarterly-december-2020
assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/987724/crown-court-2020.xlsx
Filter it by “sex” to ensure only “female” convictions are shown. Select child sex offences: 19D, 19F, 20B.1, 20B.2, 21.1, 21.2, 21.3, 23.1, 23.2, 23.3, 23.4, 23.5, 23.6.
Watch the year 2018 the rows: "total for trial", "found guilty", and "sentenced"
Add in a crime type that can only be committed by males: 19E: rape of a female child under 13 by a male, you will see that the numbers change.
The rows: "total for trial", "found guilty", and "sentenced" for “females” in 2018 all increase by one. The same happens for the year 2020
The same thing happens for other years. Looks like 2010 is the only year with no change. 2011, 2013, 2014 increases by 1 ("for trial"), 2012, 2015, 2016 all increase by 2 ("for trial").
There is meant to be an assurance mechanism as per p9 here:
"An offence coded 19/16 (“Rape of a female child under 13 by a male” under the Sexual Offences Act 2003) is reporting the sex of the offender as female. This implies that either the offence code is incorrect and needs updating, or the gender has been entered inaccurately. In this case the original court record will be looked up and the statistical record amended"
assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/987319/criminal-justice-statistics-guide-december-2020.pdf
If that happens with that crime type, then how do we know the data is correct? We don't.