I understand that TW are still allowed to run in todays London marathon as women. their times will be registered as womens times.
The marathon argue that its not a competitive event and people are not running against eachother so it doesn't matter but I would arge that it DOES as times are registered and published along with rankings.
I think the elite event is still sex segregated, no idea how they are policing that though.
I imagine that as people registered a while ago beore the ruling so perhaps it was too late to make any changes but even so its not really fair for women to be ranked with men