It turns out the leader of the #GreenParty of 馃彺鬆仹鬆仮鬆仴鬆伄鬆仹鬆伩 and 馃彺鬆仹鬆仮鬆伔鬆伂鬆伋鬆伩 previous had an account on Mastodon (hello @ZackPolanski 馃憢 ) and so did Green MP for #Brighton Pav' (hello @sianberry 馃憢)
So I emailed the party to ask if they would consider moving away from #Twitter/X in light of recent events and reboot a Mastodon effort.
I shared links to mastodon.green and a set of UK-based instances, including toot.wales.
You too can email office@greenparty.org.uk to ask that they get an official #Mastodon account.