If I'm understanding the situation correctly.
Stonewall sent a briefing to a number of MPs, Dawn Butler included.
Dawn Butler repeated an untruth contained in the briefing, that the Cass report excluded over 100 studies.
Butler then threw Stonewall under the bus by revealing they were the source of the false claim.
Stonewall have now been forced to offer a not quite apology, and are pretending they couldn't understand the Cass report until it was clarified to them.
I want to see a copy of this briefing.