Given that trans people make up 1% of the population (generous estimate) and there’s already at least one on the team, they’re probably okay on the ‘under represented group’ front for a while. You can’t even do it as a % of LGB&T as there’s overlap, ie you could be L and T or B and T but not B and L, etc. It’s almost like T is something completely different shoe-horned in with the LGB. But I digress.
The main lol here is the idea of Stonewall relying on an EA2010 exemption to limit their recruitment to candidates who share a protected characteristic - the same right they lobbied to have removed from women’s organisations and services. Although, I think this case it’s just an inexperienced/thick member of staff excitedly tweeting without thinking, rather than speaking on behalf of the organisation.