With the first race being delayed by only 5 minutes, horses at Cheltenham have started warming up despite the snow.
Thousands of spectators are expected for the Gold Cup week.
The Cheltenham Festival will open later amid warnings for race goers to leave extra time due to the poor weather.
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The singer had been tweeting in support of migrants when she was bombarded with abusive messages.
Ministers are reportedly considering plans in a bid to lower inward migration.
In a tweet on Saturday, the US president didn't give a reason for his absence but said he wished"everyone well and have a great evening".