A1 Colsterworth yesterday (3/1/14) 10am - what happened?

Just a bit curious, does anyone know what was going on here at 10am yesterday morning? Road was closed both sides, I was sat about 12 car lengths back from a police car blocking the road, cars and lorries in front of me. Various police cars, an ambulance, and a paramedic came past on the other side, we sat there for about 20mins, then the road was reopened, and expecting to drive past a scene of carnage or at least something, there was nothing there. I drove past at least a couple of miles of queuing traffic on the other carriageway, just wondered if anyone knew what had happened?

I was caught in it aswell it was horses running wild in the road

Cheers, clears that little mystery up for me.

We came across this with police blocking the road, so we managed to avoid it by turning off and going around the situation and back to the Ancaster turnoff.