There are many upsides, but as the question is about downsides, I can list a few, and I’ll open with the biggest downside - I believe it is the root cause of much of the other downsides and negatives about the UK.
- First past the post. Our antiquated electoral system ensures that the power balance stays firmly in the hands of the Tories and Labour. It effectively means that neither party ever need win an election: they just wait until the other loses one. They don't even have to provide solutions or win the argument or provide actual leadership.
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