Check out the Childline advice - it is marginally better ("it's OK not to be sure") but is also pretty chipper about puberty blockers:
www.childline.org.uk/info-advice/your-feelings/sexual-identity/transgender-identity/
The NHS pages also go off on a tangent about intersex conditions..
www.nhs.uk/conditions/gender-dysphoria/
and also say that puberty blockers are reversible:
"The effects of treatment with GnRH analogues are considered to be fully reversible, so treatment can usually be stopped at any time after a discussion between you, your child and your MDT"