Just to explain what is going on again as there seems to be some confusion . This is no ordinary Early Day Motion.
It is effectively what is called a Fatal Prayer motion which is the only way for Parliament to potentially stop alterations to statutory instruments being enacted. I.E it is a way they can stop the EHCR code from being accepted. Remember achieving this will not change the law which says women exist and have single sex spaces. It just means there would be no guidance to explain the law.
However the issue is that getting the motion from here to a debate and vote relies on either the government deciding to allow it or the opposition pushing for it. Thus it is very rare for a Fatal prayer motion to actually be passed the last time in the Commons was in 1979.
Summary here:
https://commonslibrary.parliament.uk/research-briefings/sn02569/
So is it pointless. NO it is not. Right now 51 MPs 7.85% of the house have signed. If they get say get a quarter or third of MPs to sign then there will be increasing pressure to allow a debate. The government would not have to of course, but there would be calls for it. A Fatal Prayer motion was debated in Commons committee in 2025 over government plans to alter local government elections. So they can have effect if A LOT of MPs sign and support them.
The reverse is true of course. If they cannot get much more than this it will show the TA cause in this current Parliament is pretty sunk.
So should people write to their MP. Yes if MPs who are wavering get a lot of pro EHCR letters it will incline them to sit this motion out. Keep telling them how excellent the Supreme court judgement is and how important women's safety is. A lot of TAs will be writing to their MPs we need to do the same.
A biased perspective but a summary here:
National article - See the MPs backing bid to have UK equality watchdog's trans guidance scrapped
https://archive.is/Gbd7K