Made in Scotland from Girders

The chairman of the drinks firm AG Barr is finally standing down after more than 48 years with the company.

Robin Barr, 71, will formally announce his retirement at the company's AGM.

Mr Barr is one of only two people in the world who knows the secret recipe for the best-selling Irn Bru drink and the two never travel on the same plane.

Once a month the essences for the drink are personally mixed by Robin Barr in a sealed room at the company's headquarters in Cumbernauld.

The 32 different ingredients are combined in a huge vat, which mixes 8,000 litres at a time.