Hull KR made it back-to-back wins for the first time since last June with a 42-22 win in the capital.
Rovers did their damage in the first half with six tries, three of which were converted by Michael Dobson.
Kris Welham scored two but Alex Brown was the star of the first half with a blistering hat-trick. Greg Eden also scored with Craig Gower replying for the Broncos.
London made a game of it at the start of the second half with Kieran Dixon and Chris Bailey scoring to make it 30-18 before Rovers killed the game off through tries from Liam Salter and Cory Paterson.
A late Sarginson try was nothing more than a consolation try for London as Rovers won 42-22.
Rovers did their damage in the first half with six tries, three of which were converted by Michael Dobson.
Kris Welham scored two but Alex Brown was the star of the first half with a blistering hat-trick. Greg Eden also scored with Craig Gower replying for the Broncos.
London made a game of it at the start of the second half with Kieran Dixon and Chris Bailey scoring to make it 30-18 before Rovers killed the game off through tries from Liam Salter and Cory Paterson.
A late Sarginson try was nothing more than a consolation try for London as Rovers won 42-22.