The organisers of Scotland's largest running event have apologised after miscalculating the half marathon route in 2016.

The Great Scottish Run's half marathon fell 149.7m short of the required 13.1 miles, invalidating Callum Hawkins' victory along with his Scottish record.

The Great Run Company, which organised the annual event, said it has apologised to Mr Hawkins, along with winner of the women's race, Betsy Saina. The run took place in Glasgow last October.

The miscalculation is thought to be the result of two factors: a small section of the prescribed route which was not followed correctly in Bellahouston Park, accounting for around 50m of the shortfall, while the remainder was the result of the difference between measuring on closed roads and unclosed roads.

This, say organisers, was the methodology they used in August after being notified of essential utilities works affecting the course.

Andy Mitchelmore, race director of the Great Scottish Run, said: "Great Run take responsibility for the miscalculation and we apologise unreservedly to the runners and to the City of Glasgow.

"This was an isolated incident. In the 30 years since the company was formed, more than four million people have participated in hundreds of our running events and the distances, which are measured by qualified independent parties, have been correct."

Organisers say they have have introduced several extra check steps to ensure that this will not be repeated in future years.