My report below: they ask us to report policy violations but do not include that as a category when asking for a reason for the report. Their policy prohibits sex discrimination.

Redefining ‘woman’ to include trans-identified males would allow them, plus any man with abusive motives who says the magic words ‘I am a woman’, into women’s single-sex spaces: changing rooms, toilets, rape shelters, prisons. In the UK, this would infringe the Equality Act 2010, which though it includes legal gender reassignment (not gender identity) as a protected characteristic, nevertheless guarantees women’s rights to single-sex services and spaces.

More generally, redefining ‘woman’ in this way prioritises a tiny minority over more than half of humanity. it takes away women’s rights to self-define and organise to change the problems they face because of their sex.

Therefore this petition breaks your rule against sex discrimination. Finally I note the petitioner did not ask for the definition of ‘man’ to be changed. this would not make the original petition somehow ok. It is a further indication of its sexism.