Dumfries and Galloway police are asking anyone who saw the accident on the A710 road near the Mabie House Hotel to get in contact.
We believe the wedding went ahead, but the police inquiry is focussing on the crash
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Inspectors have surveyed almost two thousand miles of roads across the region to identify the damage.
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Peter Morrison had been sending text messages and driving at excessive speeds in rain and wind before the crash near Tebay in February 2016.