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It's been one year since the death of Folajimi Olubunmi-Adewole, a 20-year old from South London who died after jumping into the Thames last year to rescue a woman.
His best friends have had a song he wrote before he died played on Radio 1Xtra's Breakfast show with Nadia Jae - and they've been speaking about what that moment meant to them.
Video by Charlotte Simpson
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