Kurt Haggerty scored two tries as Bradford Bulls beat London Broncos 28-20 to knock them off the top of the Kingstone Press Championship, with new leaders Leigh Centurions romping to a 42-12 win over Swinton Lions.
The Bulls, who handed a debut to 19-year-old academy graduate Ethan Ryan on the right wing, took an early lead when James Clare went over.
Another score from Matty Blythe swiftly followed and Haggerty made it 14-0 inside the opening 20 minutes.
The Broncos fought back with tries for James Cunningham, Jamie Thackray and Alex Foster to lead 16-14 at half-time, only for Bradford to rally again as Ryan marked his big night with a try before Alex Foster scored for London and Haggerty's second then settled matters.
Leigh moved above London into top spot after sweeping aside the Lions, leading 24-0 at half-time.
Lee Smith, Richard Owen, Dayne Weston and Sam Hopkins all ran in scores, with Martyn Ridyard converting for the extra points.
The one-way traffic continued in the second half, as Micky Higham, Harrison Hansen and Tom Armstrong went over before the visitors grabbed two late consolation tries through Liam Marshall and Chris Atkin.