Hundreds of motorists sweated in the huge traffic jam and many sat out on the barriers and bankings as temperatures soared to 80 degrees
There was just one almight bang and I knew there had been a crash. There was no sound of brakes or tyres screetching at all.
Police, ambulance staff, doctors and firefighters worked at the scene for more than two hours.
More top news
Our experts take a look at the key issues that would face Scotland and the rest of the UK if Scots vote for independence.
A look ahead at the forecast for the Border region.
Thousands of people cross the border to visit their doctor. Patients on both sides are worried about the possible effects of a “yes” vote.