How would the UK House of Commons look under MMP?

The video explores how the mixed-member proportional (MMP) electoral system, used in New Zealand, could hypothetically be applied to the UK House of Commons. It explains the MMP system, where voters cast two votes: one for a party and another for a local representative. The video analyzes the potential impact on the 2015 UK election, highlighting changes in party representation and the introduction of overhang seats to accommodate discrepancies. The analysis suggests that MMP would lead to a more proportional representation, affecting major parties and requiring coalition-building for governance.

Discuss the potential changes in voter behavior that could result from a transition to the MMP system.

What challenges arise when applying the MMP system to the UK House of Commons, particularly regarding overhang seats?