Team GB star, 28, with four Olympic medals suddenly retires after ‘creeping realisation’ career was coming to an end

QUADRUPLE Olympic medallist Jack Carlin has announced his immediate retirement from cycling. The Velodrome speedster is still only 28 but doesn’t feel he could have given “100 per cent” to the next Olympic cycle. Carlin won silver in the team sprint and bronze in the sprint at both the Tokyo and Paris Games. But he…