Cameronbridge

Guinness bought the Distillers Company in 1986 and put it into its United Distillers business in 1987.^3,4,10 In 1997 Guinness merged with Grand Metropolitan to form Diageo.^4,10

An upgrade in 1989–92 let it make neutral grain spirit, the base for vodka and gin, as well as whisky for blending.^3,5,9 In 2000 it was upgraded again at a cost of £9 million.³

In February 2007 Diageo announced Project Forth, to increase capacity from some 66 million litres of spirit a year to 105 million by 2013.^4,7,11 It built a fermentation plant with 16 vessels of 500,000 litres each, raising fermentation capacity by 75%.^4,7,11 From 2008 Diageo invested £65m in a bio-energy and water treatment plant that uses the co-products of distillation to power the distillery.^12,13 When Diageo closed its Port Dundas grain distillery in Glasgow in 2010, that production moved here and to North British.^4,6,7 A new £18m mash house replaced the old tun room, where mashing was done, and was in full production by April 2011.

It has 3 column stills of the Coffey design.^4,5,7 In 2011 Whisky Magazine reported that each of its 3 Coffey stills could make 4,000 litres of alcohol an hour.^5,7 Its water comes from boreholes along the River Leven.^5,12 In 2011 general manager Jim McCowan said blenders wanted a lighter style of grain whisky, the style Cameronbridge makes.⁷ Its curved workshop and general store, from the earlier to mid 19th century, is a Category B listed building.¹ In February 2025 Diageo announced a plan to run the site on electricity, replacing gas-powered equipment and cutting carbon emissions by more than 90%.^15,16