Almost always conservatives, the key exception in recent history being Tony “Tory Lite” Blair's time in office (who pretty much ignored many years of promises to undo the direction Thatcher and Major had taken NHS and university/student funding should Labour be returned to power, greatly irritating many of us who voted for them that time around). Unfortunately this is a common pattern: parties like Labour get control and realise how hard it is going to be to fight what has been set in motion so do too little or actively push on in the existing direction (just applying a little lipstick to the pig for public appearances). The current lot are trying to do better in that regard, but are failing so impressively elsewhere that they likely won't have a second term and one term is not enough to build momentum, so their replacement will just put a stop to any good that has actually been achieved. The scary thing is that their replacement (assuming Refrom don't rip themselves apart from the inside between now and the next election, which is something there is still hope of happening) might make the old Tories look extremely moderate.