Blues South maintained their push for the WRU Regional under 16 Championship title courtesy of a victory over Blues North at Rumney.
The South, who had previously lost only once in three games, were too strong for thjeir neighbours with captain Phil Williams once agaion to the fore.
Tries for the South included scores by Lee Collier and James Egan with Williams adding a conversion.
For the Blues North it was another difficult night although Christian Dacey and Owain Lewis capped outstanding individual performances with tries, one of which was converted by Luke Davies.