Joshua Da Silva fended off flak about his low scoring rate to post a maiden Test century for West Indies against a flagging England in the third Test.

West Indies advanced from their overnight 232-8 to post 297 all out, having at one point on Friday been floundering at 128-7.

England's slow start to day three drew criticism from former skipper Michael Vaughan, who described the tourists as "very tired" and questioned captain Joe Root's appetite for the job.

Wicketkeeper Da Silva and last man Jayden Seales produced a 52-run partnership for the 10th wicket to improve the home team's first-innings lead in St George's to 93 runs.

Da Silva reached his century with a heave down the ground for four, before it appeared he had been dismissed from the next ball, nicking Craig Overton through to Ben Foakes.

Despite asking for a review, Da Silva wandered off, expecting the video verdict to match the umpire's decision. Yet there was no evidence of an inside edge, and a surprised Da Silva was summoned back to the middle.

To England's relief, Root had Seales caught and bowled for 13 in the next over, with no addition to the West Indies score, meaning Da Silva finished on 100 not out.

Asked about his hard-earned ton, Da Silva told BT Sport: "I think the emotions said it all: tears just came to my mind instantaneously. It means the most in the whole world."

He trusted Seales to fend off the England attack, which the number 11 accomplished for 58 deliveries before Root prised him out.

"He told me he has my back and I backed him 100 per cent," Da Silva said. "He told me he was going to get me there, and he did, and I can't thank him enough for the role he played."

Da Silva, after his 257-ball innings, added: "I got a lot of stick out there for having a low strike rate, but it didn't matter to me. When I got a chance to score, I did."