The 100 metres hurdles at the 2005 World Championships in Athletics was held at the Helsinki Olympic Stadium on August 9, 10 and 11.
Olympic champion Joanna Hayes was out the fastest, gaining about a foot over the first barrier.
Ennis-London was much faster to the sixth hurdle, capturing a slight lead.
But Ennis-London lost her quick snap over the hurdles, instead gliding, relinquishing her hold on the lead while Hayes again was matching Perry stride for stride until Hayes hooked the ninth hurdle.
With her last challenger suddenly out of the race, Perry ran in to the finish with a 1-metre lead over Ennis-London, who was less than a half metre ahead of her teammate Foster-Hylton across the line for silver.