Theendisnotnigh.
That information pack is co-produced by GIRES. So it is like, say, educational materials on sex and relationships being produced by an evangelical Christian organisation but presented as being based on objective research.
GIRES was the organisation that asserted in evidence to a parliamentary committee that treating gender dysphoria could cure autism.
They provide a learning module for GP.s
elearning.rcgp.org.uk/course/info.php?popup=0&id=169 (there's the suicide threat again right on the introductory page). That is probably the only training most GPs will have done on the subject.
It's not that those in GIRES are evil, I am sure they are well meaning. It's just that it is promoting a belief system which has been swallowed hook line and sinker by the entire establishment.
If you look at their front page, they are firmly of the view that gender identity resides in the brain and determined before birth.
www.gires.org.uk/gender-variance-dysphoria/
All the research appears to be quite old, and none of it done in relation to the massive rise in teenage girls with sudden onset dysphoria, and/or of course the entirely new internet age.