i dont think its likely at all - if they represent two separate visions of how the torys carry on then both candidates will want to take it to the membership. Howard and May did not have a membership vote - but they were very much mutually agreed "safe pair of hands" candidates with the backing of the majority of the mps. And Ledsom was pretty much forced to drop her challenge - she ended up in the final two pretty much by default after johnson pulled out after being stabbed by gove - and she had very little support from mps. other contests saw ken clarke vs duncan smith, cameron vs david davies, johnson vs hunt.