The if is doing some heavy lifting there.
I know I said I wouldn't engage with Cassie but here I am.
"If" is not doing any heavy lifting. Ova said if none of the other reasons for annulment apply. Annulments are rare. It is highly unlikely any of the other reasons for annulment would apply.
Yes it would be better for trans widows to retain the law as it is i.e. the "status quo".
Fuck off Cassie, talking about things you don't understand and breezily dismissing trans widows as being less important than getting rid of the Tories.
Take a leaf out of Labour Women's Declaration's book and try and get Labour to change their policy on this rather than shrugging and assuming Labour somehow know best.