Many of us would love that, but it's in the hands of those in power...and they won't change it unless they think it'll be to their advantage, which neither of the two main parties are ever likely to do as the current system supports them as being the two most likely to win power.
I would recommend taking it to the streets. General strike, protests, blockades, demonstrations, a lot of shouting and possibly pitchforks. Has worked before!
We'd all get arrested, our lovely Conservative government has essentially made many forms of demonstration illegal! Besides, no-one is that desperate as yet. There'd need to be some massively bad situation to drive people to go that far and we're some way from that. We're also the antithesis of the French in terms of inclination to strike! Stiff upper lip and all that!
I think everyone's just rather hoping that they won't have to do that. Let's just see how the election goes shall we we can have a rebellion later if required.
you can vote based on policies. the real takeaway from that video should be that strategic voting consolidates parties while values voting gives you a chance for your values to be reflected in the politicians you vote for.