A change in British politics... or a blip?

[Beskar]

You might be unaware that a couple of years ago there was a vote on whether we'd move from First Past the Post to single transferrable vote. And people voted to remain with the status quo... Yet these videos clearly demonstrate in about 5 minutes how the system we have is pretty much worse than any alternative.

It was a vote on replacing FPTP with Alternative-Vote (not STV). It was a Referendum which got zero support in Parliament other than the Lib-dems in the Lib-dem Tory coalition. The Referendum was mandated by the Lib-dems as a condition of coalition.

This lack of support feeds into your ending point. The current system benefits the two-party system (arguably now one-party) and by opening it up, it reduces their power.