jamie vardy scored late winner to ensure his side claimed all three points at the hawthorns .
west brom led for the majority of the premier league clash thanks to a goal by craig gardner .
darren fletcher opened the scoring before david nugent levelled the scoreline after 20 minutes .
robert huth struck with 10 minutes to go to make it 2-2 before vardy hit winning goal .
west brom wore 1968 fa cup kit in honour of former striker jeff astle on ` astle day '