Rio 2016: Adam Peaty’s grandmother #OlympicNan celebrates win on Twitter

Mavis Williams, 74, has been following her grandson’s progress in Rio and tweeting with glee about his triumphs

When Adam Peaty triumphed in the 100m breaststroke, becoming the first British man to win a gold medal in the pool for a quarter of a century, most of Britain was asleep.

But there was a light on in the Sheffield home of Mavis Williams, his 74-year-old grandmother, who was watching his winning swim in the early hours of Monday morning – and tweeting about it.