By PAUL WILLIAMS

RGC............................. 15
Cardiff......................52
Dewi Cross scored a hat-trick as cup holders Cardiff marched into the final of the WRU Challenge Cup with a thumping eight-try win over RGC in Merthyr.
Wing cross lit up this semi-final at The Wern with three tries while centre Aaron Pinches added a brace to send Cardiff back to the Principality Stadium for the April 23 final.
However they had their pack to thank for laying the foundation after dominating their north Walian opponents.
Cardiff ’s scrum stamped it’s authority with an early penalty and from...