Williams, 27, from Aston, has taken photos of celebrities and musicians across his career, including at Wireless and the Reading and Leeds festivals.
He said the pressure to capture the “perfect” shot or to photograph a specific moment meant those behind the camera needed to be on their guard constantly.
“It’s patience, it’s composition, it’s lighting – that photographer looked like he was using a flashlight, it’s going to look very harsh, which is not going to look great for [Andrew], it’s going to emphasise his imperfections,” Williams explained.
“There’s a lot that goes into it; I think people think it’s just a photo, it’s not – it’s years of practice, expertise – and also a bit of luck too.
“Trying to shoot at night is one of the hardest things you can do as a photographer… the fact that [Andrew] was in a car would’ve meant he would’ve had to change his camera settings.”
Noble told the BBC that although the picture was not the best he had ever taken, it was up there with the most important.
“When we think about what’s happening right now… people are always going to go back to that and be like: ‘This captures a very specific moment’,” added Williams.