What if all of the constituencies were maintained, but Parliament were expanded to include regional proportional seats as well?
Not the Mixed Member Proportional Representation/Top Up system they have in Scotland and Wales
Preferable, yet not really preferable at all since it still would involve a party list, would be the Parallel Voting/Supplemental Member system, whereby:
1) One vote, using FPTP or, preferably, AV since every vote ultimately counts, would be cast to elect one MP for each constituency
2) A second vote would be cast for a party; the regional seats then being allocated proportionally to that party's total share of the regional vote
Dave