Scarlets fly half Rhys Priestland dives over for a try at Parc y Scarlets.
The Scarlets were the only Welsh region to record a victory in the second week's action in the LV= Cup.
Nigel Davies's young side romped home 32-17 at Parc y Scarlets to celebrate their first anniversary at their new home with a bonus point defeat of Worcester Warriors.
Fly half Rhys Priestland contributed 17 points, including a try, while wing Darren Daniel, No.8 David Lyons and full-back Dan Evans also crossed.
The Scarlets led 20-3 at the break and were always in control although a raft of changes disrupted the flow to allow the Warriors back in the game briefly. Worcester scored two late tries but Mike Ruddock's side never seriously threatened to win the game.
Replacement Ryan Lamb kicked a penalty five minutes from time to give London Irish their first win of their Anglo-Welsh campaign as they ground out a 12-11 victory against Cardiff.
Irish led 6-3 at the break thanks to a penalty apiece from Tom Homer and Peter Hewat, with Ceri Sweeney kicking a penalty for Cardiff Blues.
Hewat and Sweeney exchanged penalties after the interval before a Richie Rees try put the Blues 11-9 ahead, but Lamb stepped up to seal the win with Sweeney missing a tough long-range penalty in stoppage time.
South African Luke Watson announced his arrival with a debut try that swung the game, as Bath overcame Ospreys 21-11 in their clash at the Rec.
Watson drove over from a scrum for the opening try before Justin Tipuric replied for the Ospreys, but Daniel Browne made sure of the Bath win, with Ryan Davies converting to add to his three penalties.
Newport Gwent Dragons pushed Leicester Tigers all the way but came away empty handed from Welford Road. In an error-strewn game, Paul Turner's side lost 29-20 to a Tigers side which included eight internationals.
Jason Tovey to step inside the cover - reminiscent of Ieuan Evans' famous try for Wales in 1988 against Scotland - and go under the posts.
Jason Tovey and Aled Brew tries gave the Dragons an unlikely 12-11 lead at the break but Anthony Allen dotted down within two minutes of the re-start. A penalty try followed for the home side. Rhodri Gomer-Davies hit back for the Dragons to bring the visitors just three points behind but two Toby Flood penalties put the Tigers clear.
The LV= Cup Results
Cardiff Blues 11-12 London Irish
Newcastle 8-19 Harlequins
Wasps 21-14 Gloucester
Bath 21-11 Ospreys
Leicester 29-20 Newport-Gwent Dragons
Northampton 19-3 Saracens
Scarlets 32-17 Worcester
Ahead of their SSE SWALEC Bowl Final clash with Taffs Well at Principality Stadium on Sunday, Burry Port share their #FABXV nomination with WRUTV in the search for Welsh rugby's greatest volunteers. Everyone can get involved by sending nominations via twitter to @WRU_Community using the hashtag #FABXV
Cardiff Blues prop Gethin Jenkins and Ospreys centre Ben John look ahead to the first game at Principality Stadium in Saturday's double header which is promising to be a special occasion for all Welsh fans.
Carmarthen Quins Director of Rugby Ian Jones and committee member Jeff Thomas along with Llandovery chairman Handel Davies look ahead to Sunday's SSE SWALEC Cup showdown where both teams are out to prove 'West is best'
SWALEC ambassador Shane WIlliams is looking forward to Sunday's Finals Day where the Cup, Bowl and Plate offers a great opportunity for players and teams to experience the magic of playing at Principality Stadium
Carmarthen Quins coach Richard Kelly believes it is an exciting time to be part of the Scarlets region as his side take on local rivals Llandovery in the SSE Swalec Cup final on Sunday, as WRU TV's Graeme Gillespie discovers
Scarlets long serving prop Phil John talks to WRU TV's Graeme Gillespie about Judgement Day IV and SSE Swalec Cup finals day. The last time Llandovery were in the cup final in 2007, the Drovers claimed the spoils with Phil playing a major role in the engine room.
Meet Aberdare coach Luke Thomas whose #FABXV nomination goes to super volunteer Daz with a whopping 10 things he does for the club each week, all except the ironing! You can also join in the search for Welsh rugby's greatest volunteers, by sending your nomination via twitter to @WRU_Community using the hashtag #FABXV
SSE Swalec Cup kings Pontypridd travelled to Swansea, fully expecting a return to their second home but Llandovery had other ideas as they also sought victory in the semi-final to earn the right to play the final at Principality Stadium