King’s Lynn will take a ten-point lead into the second leg of their Knockout Cup Semi-Final against Sheffield after a brilliant 50-40 home win on Thursday. At the 18th attempt, the PSH Environmental Stars finally got the better of the South Yorkshire side in any top-flight competition with a strong team showing. Six of their seven riders were able to record at least one paid win each as they won 11 of the 15 heats against the reigning league champions. Team manager Rob Lyon said: “It was a great team performance all the way through. “With all due respect, I don’t think anybody expected us to b…