Lewes overcame treacherous conditions at Kings Langley to subject Watford to a 2-0 defeat in the FA Women's Championship.
Georgia Timms and Amelia Hazard to score a goal apiece in each half against the Golden Girls, who remain second from bottom, having claimed just one win so far this season.
Despite Watford having a goal disallowed in the first five minutes, it was Lewes who had a string of half-chances including Izzy Dalton and Timms both firing wide, and Heidi Logan forcing Mia Smith into a good low save.
It took 22 minutes for Lewes to break the deadlock after a good run and shot from Hazard was parried by Watford goalkeeper Smith, enabling Timms to bundle the ball over the line.
Watford had a chance to equalise late in the first half, but Adekite Fatuga-Dada and Flo Fyfe's attempts were cleared by a resilient Lewes defence, including a goal line stop by Nicola Cousins.
The Rooks began the second half with a string of corners, and despite the clearance off the line, they were unable to capitalise.
With 20 minutes to go, good build up play from sub Josie Longhurst, Timms and Howells found Hazard who made a clean strike to double Lewes' lead.
The loss leaves Watford 11th in the table, and are due to host Sheffield United in three weeks' time where they'll hope to score their first league goal of the new calendar year.
After the defeat Watford boss Gifton Noel-Williams said he needed to find a way to restore his players' confidence.
“To see the team kind of crumble away in the first half the way we did was quite disappointing," he told the club website. "It’s hard for me at the moment because I’m a winner and I always want to win. I think the players and all of us as staff have got to be realistic that this is a team that is second from bottom for a reason, and I’ve got players who are maybe lacking a little bit of confidence.
“It’s about us as staff finding ways. How do we get these girls feeling like they’re a million dollars? How do we get them confident? How do we get them in a place where they feel that even after they make one or two mistakes, they’re still okay and the head doesn’t go down straight away?
“It’s back to the drawing board, what can we do better? I’ve learnt some more about the players today, and I’m sure they’ve learnt a little about me.”
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