That tweet from Mimmymum sums up the mindset of Mermaids, i.e. they are the undeniable experts on transgender kids by virtue of being either parents or trans themselves.
Sadly a quick glance at their website show how totally clueless they are. Nobody has any previous experience of working with children nor any qualifications in anything like child development, psychology or counseling. They also display little awareness of their legal responsibilities relating to child protection and safety.
Yes they have policies but they don't highlight the fundamental principles in the way that other organisations do. They do however warn about the serious consequences of outing someone.
There should be an explicit statement that they can't always keep things confidential and that they have a duty to at times share information with others that are more experienced, e.g emergency services, CAMHS, social services. Example:
www.childline.org.uk/about/confidentiality-promise/
www.samaritans.org/about-samaritans/our-organisation/our-safeguarding-policy/
When Mermaids make mention of these other organisations it always seems to be in relation to Mermaids providing them with training, not the other way round.
I would also expect to see some kind of pathway that should be followed when a Mermaids volunteer/employee has concerns. The only detail in their policies is speak to SG (the Safeguarding Lead)
If the children approaching Mermaids are even slightly as vulnerable as they would have us believe, then surely they should have highly qualified people working within rigid and stringent guidelines. Instead if someone contacts Mermaids they will be advised by a volunteer who has had two days training.