The Scarlets won away from home for the first time since January as they defeated 14-man Cardiff in a dramatic Welsh derby at the Arms Park.
The first-half red card for Ellis Jenkins proved crucial as the Arms Park side let an early lead slip against a Scarlets team guided superbly by Ioan Lloyd at fly-half.
Two tries from Wales scrum-half Gareth Davies, as well as scores from Alex Craig, Steff Evans and Johnny McNicholl were enough for the Scarlets in the Welsh capital.
Get the latest World Cup news by signing up to our newsletter hereIt was a victory that went some way to relieving the pressure on Dwayne Peel after a week where frustration had built among the fanbase - with their last win away from Parc y Scarlets having also been at the Arms Park.