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Story summary
- Met Office warned El Niño could trigger colder, snow-laden conditions this winter.
- Experts say El Niño may weaken the stratospheric polar vortex, raising chances of Sudden Stratospheric Warming events.
- A weakened vortex could increase risk of cold snaps and snowfall across the United Kingdom.
- Met Office predicts a wet, stormy autumn that could develop into an icy winter.