Regardless of your preference for those chosen to govern the United Kingdom, it would be difficult to construct a convincing argument against the need for electoral reform following the result of the General Election in 2015. Significant swathes of the electorate are underrepresented in the new Parliament with those supporting UKIP being particularly hard hit: http://www.bbc.com/news/election-2015-32601281.
The issue is not about the legitimacy of the majority government elected under our current system. Instead it is about the credibility of an electoral system that delivers such misrepresentation. Whatever your political affiliation, I would urge you to sign the petition calling for a fairer, more proportional system to elect MPs at http://makeseatsmatchvotes.org/ and encourage others to do the same.
Although electoral reform will be tough to realise when the governing party relies on the current system to maintain a majority, a sustained and concerted application of pressure will undoubtedly yield change in the future.