S10 Ep 395 Joe's out running again trying to beat his 1k record.

Joe decides to try and break his 1k time again and heads to Brighton seafront for a run. He tells David his personal best for doing 5k is 21.17 so David does the math to work out what Joe needs to do to break his 1k time and then tells Joe that the world record is 2min 11. Joe doesn't think this is…