Kettering MP Philip Hollobone is the MP who has rebelled against his own party leadership the most often since 2010, according to an academic study.
In the three years since the general election, Mr Hollobone has voted against the whip 129 times, a whopping 41 more than the next most rebellious MP.
Peter Bone, MP for Wellingborough, has defied the whip 68 times since 2010, placing him fourth in the list of rebellions.
Northamptonshire MPs Michael Ellis and Andrea Leadsom have both voted against the party whip just once since their election.
Chris Heaton-Harris, Daventry MP, has rebelled eight times and Brian Binley, MP for Northampton South, has defied his leadership on 19 occasions.
The report was written by Philip Cowley and Mark Stuart from the University of Nottingham.
They found all of the top nine most rebellious MPs were Conservatives.