Ed Barnard celebrates his maiden first-class century © Andrew Miller

Jake Libby is congratulated by Ed Barnard after bringing up his century © Andrew Miller

Jake Libby brings up his century for Worcestershire at Chelmsford © Andrew Miller

Tom Westley pulls through the on-side, en route to his double century © Andrew Miller

Tom Westley brings up his double-century on the second day at Chelmsford © Andrew Miller

Tom Westley cuts through the off side © Getty Images