A moment of magic from Alex Campana saw Kings Langley take a big step towards the SSML Premier Division title as they returned with all three points from Wembley.
Already without two regulars, Kings lost Nick Jackson in the warm-up and were forced to reshuffle the pack.
But they made all the early running and were rewarded with what turned out to be the decider after 23 minutes.
A Callum Adebiyi run was halted with a trip on the edge of the box and Campana placed the ball virtually on the left hand corner of the area before delivering a curving shot into the top left of the goal that Bart Fogler got a hand to but couldn’t keep out.
Dean Hitchcock had a shot blocked as Kings sought the killer second, but Wembley came out after the interval with more bite and Joe Wright went close in an early attack.
The visitors responded with Lewis Toomey suddenly breaking clear, but with only Fogler to beat, his chip cleared both keeper and bar.
Later in the half he came closer still and was unlucky to see his shot shave the outside of the post, before Campana brought an outstanding save from Fogler and then Ollie Cox had a point blank shot scrambled off the line.
Despite all that, the lead was still a slim one and Wembley threw everything forward in the last 10 minutes – with shots from Fekiete, Witham and Humphries all narrowly off target.
But Kings had given a controlled performance, having the better of possession and chances, while Lee Burgoyne was outstanding in a midfield that allowed Wembley little chance to be creative.
With four strikers on the pitch having a tally in excess of 20 goals each, it was a good day for the defences, but Kings showed they can win ugly and close out games when protecting a narrow lead.