The Tories will eventually accept pr

First past the post is not symmetrical it is good for the party of the centre-left because (if there is to be a government) it makes sense to vote for the party who is in general in favour of the institution of government itself. This means that those who in general oppose government are inclined to prefer proportional representation. It is strange for anyone who dislikes the concept of government to be in favour of fptp which means eventually (even with fptp in place) it will change. There will be too much pressure on the party of the centre-right to accept pr for it to be resisted. Eventually the Tories will concede that fptp is an obstacle to a small government and adopt (a preference for) pr.