The mother of a girl who attends Morriston Comprehensive School told ITV News that younger children may be intimidated having to use unisex toilets.
Emma Rees, who has a 13-year-old daughter, at the school says she's told her not to use the toilets. She says young girls need their privacy in toilets.
More top news
The world record attempt will raise money for the foundation set up in memory of the Olympic gold medallist, who died in May 2013.
In today's Newsweek, Carl talks about what the 'No' vote in the Scottish Referendum could mean for Wales and the impact of legal highs.
England manager talent spotting at Swansea City v Southampton at the Liberty Stadium