Olympic heroes : Radmilovic, Bannister and Bolt

After the announcement of the Team GB Athletics squad, 18-year old sprinter Adam Gemili spoke his joy and surprise at his inclusion; 800m runner Lynsey Sharp on her controversial selection despite recording only a B qualifying time this season, and hurdler Andy Turner expresses relief after being named in the squad. Breaking records and gaining glory is the aim of every Olympian but who will make history this year? Usain Bolt was the icon of the 2008 games but after being beaten by his training partner Yohan Blake at the Jamaican national trials and withdrawing from this month’s Diamond League meet in Monaco, can the legendary sprinter return to Olympic glory? Eleanor Oldroyd speaks to Sir Roger Bannister about becoming the first man to run a mile in under four minutes in 1954. Finally, BBC Wales looks at the career of Wales' most successful Olympian, the Cardiff-born swimmer and water polo player Paulo Radmilovic.