Meet the Cardiff Half Marathon runners looking to break records
This year's Cardiff Half Marathon, is the biggest event yet, with 25,000 runners taking part. A number of them are hoping to break records as they raise money for charity.
Gwynn Jones hopes to win a world record by competing in knight attire.
A team from Cardiff University are running in full gown and caps, and if Olivia Blok finishes it, she will be the first woman to do this.
Some firefighters from South Wales will be running in full fire kit, including weighted packs and breathing apparatus.