Caernarfon lost 60-8 to Ruthin last month, but a rousing display upset the North Division leaders, who fell by 14-3. Kelvin Morris kicked three penalty goals and though John Tudor scored one for Ruthin, their unbeaten tag went after a try by Caernarfon wing Arwel Davies.
Nant Conwy closed the gap at the top after defeating Dolgellau 21-3 while Pwllheli enjoyed a victory after
winning 20-12 against Wrexham.
East leaders Bargoed are going to be hard to catch after a 33-16 win against Crumlin extended their lead at the top to eight points. Andron Abdul, Ivor Bowen and Gareth Lerwin crossed for the leaders and Chris Lay converted all three and slotted over three penalties.
In South East, Gareth Howe sent Heol y Cyw to a 17-6 victory at the Athletic Ground against Penarth, by scoring all the 17 points, including a brace of
tries. Abercwmboi's match at Bedlinog was called off and Fairwater took advantage with a 24-18 win at Aberdare to move level at the top.
West leaders Loughor took a tumble when they were well beaten 22-5 at Pembroke Dock Quins. With Llanelli Wanderers losing at home to Laugharne 17-13, the
Quins move up into joint second spot while Betws just hung on to beat lowly Tycroes 8-7.
Only three points separated the top six sides in South West and leaders Alltwen slipped up after losing 24-20 at Cefn Cribbwr. Taibach made no mistake against visitors Glais to win 35-19, Cwmgors defeated Amman United 26-3 and Briton Ferry edged out close rivals Morriston 19-14.
The last five years have been an emotional rollercoaster on and off the pitch for RGC1404. Promotion to the Principality Premiership was the culmination of five years of hard work and investment in North Wales. WRU TV caught up with prop Joe Simpson, who was one of the first intake of WRU North Wales Academy players in 2010.
Ebbw Vale captain Damien Hudd picked up the biggest accolade of the night at the 11th Principality Premiership Awards Evening held at Principality Stadium, after leading his side to the title for the first time.
Wales assistant coach Robin McBryde is predicting a tough battle against England on Sunday despite the fact they may not be considered to be at full strength. Players will be out to impress Eddie Jones which makes England a dangerous proposition, he says.
Wales U20 captain Tom Phillips and performance psychologist Dr Rich Neil explain why spending three days at Monmouth RFC has further strengthened the togetherness of the squad ahead of the #WorldRugbyU20s