These longstanding rivals served up a typically close and spirited contest, which produced plenty of late drama.
Hosts Poulton equalised with 10 minutes remaining at Cottam Hall only for the Blades to maintain their unbeaten start to the season with a second goal just three minutes from time.
The late winner was particularly cruel on Poulton keeper Charlie Clark: normally a defender, Charlie was making only his second appearance between the sticks and was outstanding throughout.
His saves had kept Poulton in the contest in the first half, which ended with his side just 1-0 down. Owen Mason scored it, converting Liam Brown’s cross at the back post.
But Poulton came back strongly after the break and their manager Ben Ankers felt they were good value for their equaliser.
Substitute Louis Hurst had not been long on the field when the ball broke to him on the right and he smashed an equaliser into the bottom corner.
Poulton had other chances too, hitting the woodwork on a couple of occasions, only to be hit by that agonising winner.
It was Charlie Croasdale who provided the final decisive twist, finding the bottom corner with his left foot.
Poulton manager Ben Ankers was proud of his charges, saying: “These two teams have been competing with each other for titles since they were seven years old.
“BJFF are the champions and won the Lancashire FA Cup last year. They have usually had the edge over us but my players were a credit to themselves and the club.”
Manager Darren Brown is rightly delighted with BJ’s start to the season. He said: “We are unbeaten after five in the league and our defence of the county cup is going well (they are through to the last 16 with a home draw next), so everything is positive.”