Scott Carson made another high-profile howler to set Fulham on course for a 3-0 victory that lifted them out of the Barclays Premier League relegation zone.
Carson, whose blunder against Croatia contributed to England failing to qualify for Euro 2008, got both hands to Simon Davies' 30-yard drive on the brink of half-time but could only deflect the ball into his own net.
West Brom's defence was then exposed after the break as Fulham cruised to a first home win in six attempts with headed goals from Clint Dempsey and Brede Hangeland.
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