The family of a three year old boy killed when a concrete bollard toppled onto him at the Royal Highland Show have spoken of their devastation.

Benn Craggs is thought to have been swinging on a chain between two bollards in a car park when one fell and struck him on the head.

He was taken to hospital with serious injuries but died a short time later and a post mortem is to be held.

Ben, an only child, was with his parents Jonathan Craggs, 47, and Dawn Surtees, 42, on the opening day of Scotland's top agricultural show near Edinburgh.

The couple, who run a farm and bed and breakfast business in Sedgefield, Co Durham, were exhibiting beef cattle at the event.

Jonathan would have had his fourth birthday next week and his mother had bought him his uniform and he was looking forward to starting school in September,

Mr Cragg's mother Barbara Irvine, 70, a retired farmer, said it will be difficult to imagine life without the grandson with a cheeky smile who she called "my little cherub".

She said: "I've spoken to Jonathan and he is devastated. They said Ben died instantly so that is some relief. It is tragic.

"Ben was such a lively and boisterous little boy. Before the family went up to the show, we had a barbecue and Ben parked His toy tractor and trailer and said to me 'Leave that there Granny and I'll Come collect it'. I still haven't moved it yet."

Mrs Irvine said Ben was a regular with his parents at agricultural shows and enjoyed the outdoor and farming life.

She said: "We can't understand why this has happened. The bollard shouldn't have tipped over.

"Children shouldn't have had access to an area where this could have happened. It remains to be seen whether it was just a tragic accident."

Lothian and Borders Police, who are investigating Ben's death, have urged witnesses to come forward.