Joie Chitwood, president of the Daytona International Speedway, has said that Sunday's main race will go ahead despite the recent incident.
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The London Mayor insisted he was "not saying that nationalists are somehow racist or bigoted" after outraging SNP supporters.
Weather conditions remain wet and windy through the weekend
Jade Dunne, 29, has been charged with owning a dog dangerously out of control resulting in the death of Dexter Neal at her home in Halstead.