The U16s added the Myton League trophy to their cabinet, to go with their recent County Cup win, whilst the U15s' 3-1 win over Cottingham Rangers Blues meant they topped the Drypool League table.
The U16s' opponents Costello conceded their fixture with Rangers because of a lack of players, which meant Hall Road received all three points, and regardless of the nature of the victory, Paul Mortimer's side deserve their second piece of silverware of the season.
Having conceded only 16 goals in 18 games, Rangers had the best defensive record in the league.
They can complete a hat-trick of trophies, and indeed a deserved treble on Sunday May 20th, when they face Scarborough Athletic U16s in the final of the Knockout Cup.
Keith Graham's U15s meanwhile, will be playing Myton League football at U16 level next year after a superb season.