I think this should have its own thread for visibility. The Data Bill is being debated this week and will introduce self ID by the back door unless an amendment is made. Sex Matters has a template letter on this to send to your MP. It will only take a few minutes but it MUST be sent today (Monday 5th) so please make this your Bank Holiday terfing.
https://sex-matters.org/posts/updates/urgent-action-email-your-mp-today-on-the-data-bill/