Jay Sewell, Henley Webb, Isaiah Byrne and Alex Mixalache were among their marksmen.
However, with games in hand Norbridge can hope to overtake them after their successful 4-1 league leaders battle against Redlands with goals from Oliver Fergie, Thomas Streets and Rhys Clay.
Prospect Hill, joint league winners last season, lost their first match of the current campaign when in a high-scoring game.
Sparken Hill’s Theo and Harley Cookson and Shaun Blake-Sutton outgunned Prospect’s William Musgrove and Freddie Valente.