Bus operator First says all services in Huddersfield and Calderdale have been suspended because of the snow.
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Detectives leading a criminal investigation into the disaster want to speak to 19 people seen on CCTV at the stadium that day.
The brothers were greeted by fans after winning gold and silver in the triathlon at Rio 2016
The medal-winning duo, who live and train in Leeds, say they've been amazed by the reception on returning from Rio