UWIC are all-but-confirmed as champions of Division One East - despite not taking to the field last weekend.
With the students out-of-action, second-placed Bargoed had the chance to close the gap at the top to two points heading in to the final weeks of the season.
But they were smashed by rivals Bargoed in a high-scoring thriller, which leaves the race for second wide open.
The hosts ran-in seven tries through Ashley Norton, Rhys Humphreys, Ricky Cochlin, Adam Cullen, Lee Williams, Gareth Dare and Jamie Howells.
Llanharan replied through a brace-apiece by Elliot Foiles and Lee Thorne, but they were well beaten in the end, 52-31.
Caerphilly were relegated after they were destroyed by Blackwood at Glan yr Afon Park. Gareth Price and Mark Birkraer braces were among the nine Blackwood tries as they sealed the visitors' fate with a 61-7 triumph.
Things are getting tight for the second relegation spot, and Ystrad Rhondda took a huge step towards safety with a fine 35-17 victory over
Tredegar. Shaun Robson bagged a double, and Nathan Hughes, Alex Webber and Mazin al-Azlani also touched-down for the hosts.
They are now level on points with Beddau, who played out a thrilling 32-32 draw with Merthyr.
Lewis Jones and Viv Owen both crossed twice for Beddau as they sealed what could turn out to be a precious two points.
Bedlinog can now begin to look ahead after confirming their safety with a 26-17 victory against Rumney. Martin Luckwell, Phil Cocharan and Martin Jones scored the hosts' tries.
Builth Wells pulled off one of the results of the season in Division One West as they beat third-placed Narberth, 19-17.
Tries by George Jenkins and Andy Garrod for Builth were cancelled out by scores for Michael Thomas and Nick Clancy for Bonymaen, who led 17-16 with two minutes remaining. It was then left to Builth star John Thurston to slot over a late penalty and seal a famous victory for the hosts.
That result also saw Whitland confirmed as second place finishers, despite them being given a lesson in running rugby from champions Tonmawr.
Scores from Juan Socino (2), Tal Selley, Gareth John and Darryl Harvey, plus a penalty try, saw Tonmawr to a 45-20 victory at the Memorial Ground.
Bridgend seem to be heading for safety after they beat Carmarthen 32-12. Tom Grabham, Lloyd Peers and a Matthew Morgan double saw them to an important bonus-point triumph.
Felinfoel sealed their safety with a 43-23 victory at relegated Cymllynfell and Bridgend Athletic beat Corus 44-24.
Wales Head Coach Rob Howley talks to WRU TV's Sebastian Barrett about the 36-man squad he has just named for the forthcoming Under Armour series, which includes two uncapped players, Ospreys duo Sam Davies and Rory Thornton.
Head coach Rowland Phillips is deligthed he can now call BT Sport Cardiff Arms Park home for his Wales Women's side, who launch their international season next month with games against Scotland and UK Armed Forces in the heart of the capital city.
Wales Sevens star Sam Cross has put his home town club of Brynmawr on the map after winning a silver medal at the Rio Olympics with Team GB. His club have now honoured him by naming their players bar after him, as WRU TV discovered at the official launch, recently.
One of the newest members of the Principality Premiership, Bargoed admit it's proving to be a steep learning curve at the highest level, but are determined to become a force to be reckoned with. WRU TV visited the club last weekend when they took on Llanelli.
Table-topping Aberavon travel to north Wales to tackle RGC 1404 as both teams defend unbeaten starts to the season in the Principality Premiership. WRU TV's Graeme Gillespie visited the Wizards to see how their preparations were going for the game of the weekend.
The Half a Game initiative is currently sweeping across Wales and proving a major success. The scheme aims to give every young player at least half a game every weekend. WRU TV recently visited a festival in Narberth where clubs have fully embraced the initiative.
Both Bargoed and Swansea were seeking their first win of the Principality Premiership season this afternoon. It proved a fruitful day for the hosts - not only did they win, but Bargoed claimed a try bonus point.
Cardiff managed to keep their unbeaten record at home intact, but only just as Bridgend made them work extremely hard before the Blue and Blacks secured a hard fought Principality Premiership win at the BT Sport Arms Park last night.
Former Wales back row Andy Powell gives a guided tour of The Wern, home of Merthyr RFC, who are determined to prove a lot of people wrong and make their mark in their first season in the Principality Premiership.