From an internet search for some key terms in the OP, the only other place this document turned up was in a Facebook post by a member of Wavertree CLP (Liverpool) who has also shared it to a couple of Facebook Pages - and who is a signatory to this open letter:
"We support transgender inclusivity in the Labour Party"
www.thejeremycorbyneffect.com/jeremycorbyn/we-support-transgender-inclusivity-in-the-labour-party
FB post starts:
"Post shared anonymously from trans friends. This is a long post but please do read, take action and share if you care about trans rights
"Want to try to prevent the UK Gov progressing the anti-trans proposals listed in yesterday's Sunday Times? Here are my suggestions:"
FB post has 4 likes to date.
Shared to FB Pages (no traction on either of these posts):
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Insufferably Intolerant Science Nerd
Bio: "Science. Tea. Coffee fetish. Metalhead. Atheist. Woman-shaped Nerd. Queer as F**k. Must love cats. Sometimes I swear."
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Lizzy the Lezzy
"Lizzy started out as an animated lesbian stand-up comedian on YouTube. Actually it was MySpace, but who cares about MySpace. Then along came facebook, and well, this page happened. The intention of the page was/is to make ourselves feel better about our sexuality - to face it, embrace it and have a laugh about it."
Strange result when archiving that Facebook post using archive.today - a Facebook Chat message was archived along with the page, stating that the person concerned was a "new friend". That person is neither my FB Friend nor a FB Friend of the person who posted the "call to action" on behalf of trans friends.
Archived on web.archive, which behaves normally!
<a class="break-all" href="https://web.archive.org/web/20200616154548/www.facebook.com/ScaryBiscuit/posts/10157335913288030" rel="nofollow" target="_blank">web.archive.org/web/20200616154548/www.facebook.com/ScaryBiscuit/posts/10157335913288030
If this is circulating as a call to action then it must be right under the RADAR.
Re-reading it . . . in amongst the overwhelming batshittery there are some worrying signs of sensible tactics!
"Try and get opinion pieces and letters to the editor by cis women into newspapers today and tomorrow. Try and get women's orgs of any size to publicly denounce the proposals as unnecessary and harmful to all women and girls, not just trans women. Get them to say there's nothing wrong with the way single sex services are currently operating and these proposals could even result in less provision of single sex services and closure of local authority public toilets."
Absolute rubbish but spouted by a "woman's org" it might well pass as credible!