How many electoral regions are there in the UK under the party list system?

The correct answer is 12, aligning with the structure of the party list system used for elections to the European Parliament in the UK, which has been based on regional representation. Each of these 12 electoral regions is designed to represent specific geographical areas, allowing voters to select a party rather than an individual candidate.

In this system, the number of representatives is determined based on the proportion of votes each party receives, which enhances the representation of smaller parties compared to a first-past-the-post system. The 12 regions outlined for this system provide a consolidated approach to ensure that diverse political interests across the UK are reflected in the elected body.

Other options propose different numbers of regions, but only 12 accurately captures the established division for the party list electoral method. This system is particularly significant for promoting fairness and representation in elections at the European level within the UK's broader electoral framework.