Police have said that a man who died in Newton Stewart last night might have been seen by passers by between 10.30 and midnight. Anyone in the Albert Street, Dashwood Square, Queen Street area at that time is being asked to come forward.
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Christian Pay's family say he was "loved by all" and had "the heart of a lion". The 18-year-old died after falling ill at the festival.
The first of seven races will begin at 5:45pm, and 76 horses are competing. The UK's top female jockey is amongst the competitors.
Thousands of people are expected to flock to Brampton to catch a glimpse of the colourful breed, which is more common in warmer climates.