The entire country is covered by alerts for wind and rare red weather warnings have been issued for Scotland and Northern Ireland.
Ireland has recorded its strongest-ever mean wind speed, according to its meteorological service.
Met Eireann said a mean wind speed of nearly 84mph (135km/h) was recorded at Mace Head in Co Galway at 4am.
Sky News correspondents are across the UK with the latest updates.
Read more: https://news.sky.com/story/eowyn-latest-flights-cancelled-and-travel-disrupted-as-storm-hits-uk-with-rare-red-weather-warnings-issued-13294994#8985122
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