RGC 1404 secured a remarkable away win at Rumney after coming back from 21-0 down to claim a 24-21 bonus point victory. The Division One leaders endured a torrid 15-minute period in the first half after conceding three converted tries to the hosts in quick succession.
But the northerners went over before half time and added a further three tries in the second half to stay four points clear of nearest rivals Ystrad Rhondda, who have a game in hand.
Rhydyfelin scored a staggering 18 tries against bottom-of-the-table Tredegar with hat-tricks apiece for Lloyd Peart, Ross Lucas and Rhys Chinnuck all contributing towards a 114-10 scoreline.
In Division Two, Bedlinog remain at the top despite dropping points at fourth-placed Senghenydd - the match finished as a 6-6 draw.
Rhiwbina ensured a close end-of-season run-in after they moved to third position after brushing aside Fleur De Lys in a 29-8 home win. There are now only four points separating leaders Bedlinog and their opponents today, Senghennydd, with Nelson and Rhiwbina occupying the second and third spots respectively.
Elsewhere, Abertillery BG edged closer towards the Division Three title after securing a bonus point victory against second-placed Newport HSOB. The league leaders, who are now nine points ahead at the top with only six games remaining, went over four times to earn a crucial 27-7 away win.
Wales Under 20 travel to Newcastle on Friday to face England at Kingston Park. With the likes of Jack Dixon and Ashley Evans returning to the squad, it's arguably the strongest side head coach Byron Hayward has put out in the tournament so far. WRU TV previews the game with Defence Coach Richard Hodges and captain Steffan Hughes.
Wales head coach Warren Gatland gives an exclusive interview to WRU TV after naming his side to face England in the RBS 6 Nations at Twickenham on Sunday. Gatland has recalled British & Irish Lions duo Jonathan Davies and Alun Wyn Jones to his side while Rhys Webb retains his place at scrum half.
Scrum half Rhys Webb and lock Jake Ball both made their first Wales starts in last Friday's win over France at the Millennium Stadium. They talk exclusively to WRU TV's Luke Broadley about their experiences of the day.
Wales Women's Head Coach Rhys Edwards has made three changes to his side to face France at Aberavon on Sunday, where he expects his side to be given a tough time against one of the best teams in the world.