Are we seeing what is called "the end of the uniparty" in the UK?
It's doesn't seem a stretch to think many voters will 'try something different' next time.
I suppose that if you increase the population by 10 million+ in the last two decades it's not entirely surprising that the infrastructure begins to degrade as available funds are spread thinner.
Everybody can see the lack of housebuilds, the potholes in the road, the reduction in local authority services etc
To upgrade all infrastructure needs money and the markets won't lend except at high rates currently as they seem nervy about the chance of seeing money well spent.
Above all it needs political will and (in my opinion) the traditional parties are hamstrung due to their respective ideologies (we see this in numerous EU states as well), it needs shock treatment that new entities can provide.