How interesting that you've chosen to omit the wording that very much implies girls that identify as boys don't belong in guides.
I'm sure aargh is capable of drawing her own conclusions by reading the PDF.
Actually, I think that bit is a bit woolly and is not anywhere near as explicit as the bits about including boys who identify as girls.
"Girl’ is defined based on gender identity. This means that any child who self-identifies as a girl should feel safe and welcome in our girl-only space regardless of the sex that they were assigned at birth."
Nothing about safety of the girls who are actually girls. It is not a safeguarding concern.