Our sports correspondent, Jane Dugal has more details the world swimming championships getting underway in Budapest.

But just hours earlier in the same city, the sport's governing body had made a crucial decision.

Members of Fianna voted to effectively bar any trans woman who has gone through male puberty from competing in women's events.

We have to protect the rights of all our athletes to compete, but we also have to protect competitive fairness at our events, especially women's competition.

The policy has been prompted by swimmers such as american leah thomas, the first known transgender swimmer to win a U.

S.

National college title, thomas will now not be eligible to compete in women's events at the World Championships or the olympics.

Former olympic swimmer and campaigner Sharon Davies has welcomed it.

I'm really proud of my association to be the first to come forward and actually based their rules on proved science.

You know, we've been asking for that for five years now.

All we've ever wanted to have fair sport for females.

It's an incredibly divisive subject.

The debate has led to other sports examining their policies, including world cycling's governing body, who will tighten their rules.

It follows trans athletes Emily Bridges failed attempt to compete in the women's category.

Finna say they will also create an open category, but those disappointed with today's changes say that's scant consolation if trans women have undergone an appropriate period of testosterone suppression, then their advantages will be mitigated to the point where we can have meaningful competition between trans women.

Fairness and inclusion are the cornerstones of sport.

But this issue has seen the two collide and when feelings run as deep as this, affecting so many, they won't dissipate anytime soon jane duggal BBC news.