Mark Foster looks back: ‘After my first Olympics, I was working as a groundsman, lifeguard and glazier. I thought the swimming was over’

The former world champion swimmer turned BBC commentator on 5am starts with his mum, a Jaws epiphany, and why he struggled to come outBorn in Billericay, Essex, in 1970, Mark Foster is a former competitive swimmer and winner of 51 major international medals, including six world titles, two...