Swansea claimed the south Wales derby bragging rights with a 2-0 win over Cardiff.

Liam Cullen volleyed beyond Ethan Horvath – his sixth goal of the season – after 34 minutes in what was a dominant first-half showing from Swansea.

Cullen then missed a penalty in the 51st minute as Cardiff improved in the second half, but Jamal Lowe struck in injury-time to earn Luke Williams’ men all three points.

It ensured the Swans earned back-to-back home wins for the first time under Williams, while defeat ended Cardiff’s four-game winning run.

The Swans clearly meant business as they sought to avenge their 2-0 loss in the reverse fixture – with Harry Darling and Cullen having decent efforts early on.

Cardiff looked nervy and almost fell behind in the 16th minute when Jamie Paterson’s lofted cross found Darling unmarked, although the centre-back’s header crashed off the crossbar.

The hosts were left incensed moments later when Yakou Meite escaped a red card for pushing his head into the face of Darling.

The Bluebirds eventually showed signs of settling and saw Dimitrios Goutas poke wide from a David Turnbull corner.

But Swansea got the breakthrough their efforts warranted just after the half-hour mark following sublime work from January signing Ronald.

The Brazilian winger lifted the ball over Josh Wilson-Esbrand before darting 40 yards upfield and laying off to Kyle Naughton.

The experienced defender’s floated delivery found Cullen, who coolly volleyed beyond Horvath at the back post to send the home fans into raptures.

Ronald himself then rifled over as the Swans looked for a second, and Erol Bulut will no doubt have been pleased to reach half-time with his side only a goal down.

The Cardiff boss sent Rubin Colwill and Callum O’Dowda on for Turnbull and Meite, although they made a disastrous start to the second-half as Perry Ng conceded a penalty for dragging down Ronald.

However, first-half goal hero Cullen could only fire the spot-kick wide to give Cardiff hope.

The miss certainly lifted Cardiff’s spirits, with Nat Phillips heading at Carl Rushworth before Colwill lashed over as the visitors finally threatened.

Bulut’s men enjoyed more periods in possession as Ollie Tanner and Josh Key replaced Josh Bowler and Naughton respectively.

Ronald – now on the left flank – continued to show his quality though and beautifully picked out Cullen who headed wide.

Ollie Cooper, Lowe and Jay Fulton were all summoned from the bench, while Wales star Aaron Ramsey returned after a month on the sidelines with 19 minutes left on the clock.

The final stages were cagey as Horvath comfortably gathered Matt Grimes’ free-kick before Goutas headed over at the other end.

But Lowe rounded Horvath before drilling into the net in the sixth minute of added time as Swansea clinched a third successive home win over their neighbours, who lost ground in the race for a Sky Bet Championship play-off spot.

January signings Mikey Johnston and Andreas Weimann scored in either half as West Brom beat Cardiff 2-0 for a fifth straight Championship home win.

Johnston struck inside the first minute when he turned home Tom Fellows’ delivery from the right. In the 80th minute, Weimann scored his second goal in Albion colours when he rounded off a smart move involving his captain Jed Wallace.

It took West Brom all of 30 seconds to open the scoring. Darnell Furlong clipped the ball down the wing for Fellows and he was afforded the space to run at Jamilu Collins before pulling the ball back into the path of the onrushing Johnston who, on his full debut for the hosts, steered tidily beyond visiting goalkeeper Ethan Horvath.

The Hawthorns rose in the 12th minute to pay tribute with applause to stricken forward Daryl Dike. The United States international ruptured his Achilles in the 2-2 draw at Ipswich on Saturday and he is due for surgery and an extended period on the sidelines. Dike’s team-mates had worn T-shirts with his name and number on their backs while they were warming up before kick-off.

Despite the early setback, Cardiff were by no means deterred. Josh Wilson-Esbrand hit an admittedly hopeful shot tamely into Alex Palmer’s arms, before Nat Phillips caused problems from a David Turnbull free-kick and sparked panic before Albion hurried a clearance.

The hosts had an opening to double their advantage 25 minutes in, when the ball was worked down the left and Okay Yokuslu turned the ball into the path of midfield partner Alex Mowatt, but he could not keep his curling attempt beneath the crossbar.

While the score remained at one, Cardiff were always encouraged, yet there was little to report by way of second-half action until Kion Etete passed up a glaring opportunity to level for the visitors.

Wilson-Esbrand sent a deep cross to the back post, where the ball was cushioned down by Aaron Ramsey for Etete. From inside the six-yard box, he could only lift the ball over the bar.

While those Cardiff substitutes did not combine successfully, West Brom’s did. With 10 minutes remaining, Albion broke through Nathaniel Chalobah who set loose winger Wallace down the right. His cross was pinpoint for Weimann, who rolled the ball home to make the points secure.