The referendum on whether we should use the Alternative Vote (AV) system to elect MPs to the House of Commons, offers us a small but significant change which could make a big difference.
The arguments over AV have often centred on speculation about the extent to which the new system would (dis)advantage any particular party. This can sometimes be informative – for example, the BNP are opposed to AV because they realise it would make it impossible for the party to get someone elected to Westminster in the same way that they have succeeded in local council elections under the First Past The Post (FPTP) System.