What is the evidence that Carrie is a prominent Stonewall handmaiden?
Stonewall events are standard at Party Conferences. She stood in for elected politicians, and did not mention trans. But that is all.
(She is also friendly with a key Stonewall activist within the Tory party, though I forget his name, but equally is friendly with Nimco Ali and Sajid Javid, the latter seemingly interested in reversing some of the Stonewall stuff in the health service.)