Cumbria Police say the fire is on a crane which was travelling on the back of a large HGV when it caught fire. The driver of the lorry escaped without injury and no-one else is believed to be injured.
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Members of Unite are campaigning to have a full-time union convenor at the site.
A look ahead at the forecast for the Border region.
The company operating the Borders Railway are warning there will be disruption to services when the Queen attends the official opening.