OK, I see a problem here.

There are 14 candidates. Voters can rank order their top 10 preferences.  The likelihood, it seems to me, is that a great many voters will not get beyond 5.

So after 4 rounds we lose the bottom 4 who might have 5% support between them.  A couple of more rounds and there is maybe another 5% to divvy up.  2 more rounds, maybe another 10%.  At that point, no candidate is over 35%.

So onto Round 9.  And 10.  And 11. At this point, the total number of votes to be counted starts to decline noticeably as many people have not made 7th, 8th, 9th and 10th choices.

The result will be that the winner ends up with far fewer than 50% of the votes of all people who cast a ballot to begin with (maybe 40%).

What a mess for the Conservatives that will be.