James Botham crashes over from close range for a consolation score. 35-18 #URC
Costelow extends the hosts' lead from the tee. 38-13 #URC
A number of changes here as Rhys Carre, Dmitri Arhip, Lloyd Williams and Rhys Priestland all come on, looking to change the tide of this game. 32-13 #URC
Strong carry from Ellis Jenkins as the captain looks to inject momentum into his side. Scarlets knock on in the following phase, resulting in a half way scrum. 32-13 #URC
McNicholl is over as Scarlets capitalise on a spilled high ball. Costelow converts. 32-13 #URC
Sam Costelow extends the lead for Scarlets as Dillon Lewis and Jason Harries return. Kirby Myhill is also on to replace Kristian Dacey. 25-13 #URC
Josh Adams the latest to be sent to the bin, this time for a deliberate knock on - despite his best acrobatic efforts to gather the deflection. The penalty brings an end to a breathless phase. 22-13 #URC
Frantic passage of play as the game opens up. Edge of your seat stuff as both sides chuck it about, looking for an opening 22-13 #URC
A stunning kick from Tomos Williams to find space in the backfield and find touch in the corner, pinning the hosts back on their own line. 22-13 #URC
Sione Kalamafoni is shown a red card for the tackle on Bradley. 22-13 #URC
Gwilym Bradley receiving treatment here after being caught high in the tackle. The back row is sent for a HIA, with Rory Thornton introduced. 22-13 #URC
Pressure finally tells as Scarlets cross for their third in the final play of the half. Kalamafoni the man to claim the try from the base of the scrum. 22-13 #URC
Scarlets claim to have scored a third, but TMO judges Scott Williams to have kncoked on. 15-13 #URC
Scarlets strikes from first phase at a line-out. It's McNicholl who finds the space to slide over. 15-13 #URC
Jarrod Evans slots a second penalty to edge Cardiff back ahead on the half-hour mark. 10-13 #URC
Disappointing for James Ratti as his evening comes to an end early, hobbling off. Gwilym Bradley is on for his first appearance of the season. 10-10 #URC
Botham does well to slice Williams down out wide, but the ball comes back to openfield in the centre of the park and Costelow slices through the midfield to slide in under the sticks. The outside half converts his own try to make it level. 10-10 #URC
Crunching tackle from Botham on Kalamafoni as Scarlets look to counter once more. 3-10 #URC
Over-throw at the line allows Gareth Davies to clear. Amos is back to cover and deals with the pressure from the chase to clear his lines. 3-10 #URC
Big turnover in midfield from captain Ellis Jenkins. Evans brings us back into the Scarlets half, finding touch on the 22m line. 3-10 #URC
Jason Harries does well to put pressure on Scarlets aerially. The wing picks up the scraps and fires wide to Ben Thomas. There is loads of space behind and the centre threads it through for Adams, who takes a touch before dotting down. Evans converts. 3-10 #URC
Cardiff looking to pin Scarlets deep, with both Seb Davies and Jarrod Evans making crucial tackles on the chase to quash McNicholl's counter runs. 3-3 #URC
Cardiff seeking a quick reply to Costelow penalty, but just fumble on the fringe of Scarlets' 22. Chance for the scrum to assert pressure on the hosts. 3-3 #URC
Pressure turns into points as Jarrod Evans opens the scoring from the tee. Jarrod Evans gyda'r pwyntiau cyntaf yma yn Llanelli. 0-3 #URC
We are underway here in Llanelli and Cardiff have the early territory, looking for a breakthrough on the fringe of Scarlets' 22. Caerdydd sydd yn ymosod yn y munudau agoriadol. 0-0 #URC