Most just want to stay in power and avoid a general election.  In case our system is a bit obscure, the prime Minister (Head of gov) can call a general election at any time, and everyone votes for their local MP (Member of Parliament)  This must happen at least at the end of each four year period, but can also when the government is in trouble, or the prime minister likewise, or conversely when they think they are way ahead, and can slam dunk their way into another straight four years.. Each MP looks after a constituency, which may have perhaps 100,000 people, but often much more, or much less.  Whichever party gets the majority of MPs is in power.. So it's not always the most votes, but more like your state by state for Senators, if I've got your bit right... So if they had dumped May, there would likely have been an election, and some might lose their seats.. but if they voted FOR her, it all stays as is.. so no bias behind their decisions ? RIGHT...... Hmmm...