Jonny Bairstow shored up England's lead with a brisk half-century, England v South Africa, 3rd Investec Test, The Oval, 4th day, July 30, 2017 © Getty Images
Ben Stokes was cleaned up by Chris Morris for 31, England v South Africa, 3rd Investec Test, The Oval, 4th day, July 30, 2017 © Getty Images
Jonny Bairstow carves one away behind square on the off side, England v South Africa, 3rd Investec Test, The Oval, 4th day, July 30, 2017 © Getty Images