By Jonathan Agnew BBC cricket correspondent

West Indies are hanging by a thread in the first Test.

All his shots have now returned, and he is timing the ball beautifully

Although half an hour was lost to bad light at the end of the fourth day it seems unlikely they will survive for the 90 overs that remain in the match.

The pitch continues to be slow, offering no bounce to the fast bowlers, but Ashley Giles is causing the left handers real problems by bowling into the rough outside off stump.

He should have been awarded the wicket of Shivnarine Chanderpaul when, first ball, he gloved the ball directly to Robert Key at short leg.

Giles celebrated immediately, convinced that umpire Rudi Koertzen would raise his finger in his usual painfully slow style.

He didn't, and Chanderpaul - who scored a century in the first innings - remains with Brian Lara to prevent an early defeat.

Giles, meanwhile, needs three more wickets to be the most successful English spinner here for 21 years when Nick Cook, on his debut, took eight wickets against New Zealand.

Although the West Indian bowling was much more controlled second time around, England were able to dominate the day because of their large first innings lead.

Pedro Collins removed Marcus Trescothick for 45 and Andrew Strauss for 35, which brought in Michael Vaughan.

The England captain would have had a declaration figure in the back of his mind, and he showed his positive intent by urging Robert Key to run quick singles whenever possible.

This led to Key's run out - although it was not Vaughan's fault. Chanderpaul hit the stumps direct and Key was on his way for 15.

Vaughan should have been run out shortly afterwards when he was left stranded, and a direct throw missed the stumps.

But he put on 116 with Thorpe, who fell caught and bowled by Gayle for 38, before the day's great entertainment - his riotous stand of 92 with Andrew Flintoff made from only 69 balls.

Flintoff is the ideal man when quick runs are needed, and he raced to 58 from only 42 balls.

But even he was overshadowed by Vaughan, who underlined his return to form by becoming only the third batsman ever to score a hundred in each innings of a Test at Lord's.

All his shots have now returned, and he is timing the ball beautifully. It just goes to show it does not matter how talented you are, there is no substitute for hard work.