They refused to allow definitions into the GRA because it would have crumbled the illusion.
The entire Act balances upon the illusion that you can treat two entirely different concepts as if they were interchangeable when you want. Clarity kills the Act. So they refused clarity.
twitter.com/HairyLeggdHarpy/status/1052160108489334785
Lord Tebbit was crystal clear on the definitions of sex and gender. He kept tabling amendments that provided the definitions.
The government kept refusing to allow them.