"Decisions that only effect England should only be decided by MPs in England. What this election has done is to emphasise that the politics are moving against the Labour party."
It is already Conservative policy that Scottish MPs should not vote on English laws.
Without an English Parliament this policy is not really coherent because a Government with a majority of British MPs might not have an English majority and vice-versa. There’s also the issue of Scottish MPs holding English Ministries.
Nevertheless, the Tories will be in a position to make more hay on this issue in the current Parliament and Rifkind’s remarks suggest they are willing to do so.