England v Sri Lanka, 2nd Investec Test, Headingley, 2nd day
Robson and Ballance put England in control
Dhammika Prasad removed Alastair Cook in the morning's fourth over as the England captain continued to struggle•Getty Images
Robson waited patiently for loose deliveries•Getty Images
Fancy dress Saturday: the men in white coats were needed in the stands•Getty Images
Ian Bell, in his 100th Test, reached a half-century...•PA Photos
Sam Robson notched his first Test half-century during a steady first session•PA Photos
Gary Ballance continued his productive series with a half-century in a second-wicket stand of 149•Getty Images
Ballance was caught behind off Angelo Mathews shortly before tea•Getty Images
...before falling caught down the leg side off Shaminda Eranga•Getty Images
Bird's eye view: the local wildlife admire Robson's drive•Getty Images
Robson takes in the ovation for his maiden Test hundred after sitting through tea on 98•Getty Images
Eranga also removed Moeen Ali as England finished the day on 318 for 6•AFP