I have completed the consultation - like your friend @Fearandsurprise, I wanted to really emphasis the mess that has been, is being, and will be created by this interchanging of 'sex' and 'gender'. Many of my responses are based on that. It's the most irritating and unhelpful part of it, people who should know better, talking at cross-purposes all the time but resulting in very real consequences for women and girls.
I found the WPUK and Fair Play for Women guidance really helpful
WPUK
Fair Play for Women
I found that I was having to write out 'biological female', 'biological male', 'male-born with a penis' just to make absolutely sure my answers would not be misinterpreted. By my own Government. What a ridiculous state of affairs! I did actually write that in one of the boxes, that I couldn't believe I was having to specify what kind of female I was talking about!