Firstly my own MP. By email, twice getting the same standard (Labour) response each time. Then in person when he was firmly on the anti Self ID side.
Secondly two Conservative MPs I am acquainted with. One Cabinet minister who gave a non committal but pleasant response. Another who used to be in the cabinet who gave a positive response saying they would not vote for anything which removed women only spaces.
There are more MPs than you might think who share our view!