The Carling Brewery was founded in 1840 by Thomas Carling at London, Canada. Carling lager was first sold in the United Kingdom in 1952, and in the early 1980s became the UK's most popular beer brand by volume sold. The company was acquired by Canadian Breweries, renamed Carling O'Keefe, and merged with the Molson Brewery, which then merged with Coors to form Molson Coors.

London is a city in southwestern Ontario, Canada, along the Quebec City–Windsor Corridor. The city had a population of 422,324 according to the 2021 Canadian census. London is at the confluence of the Thames River and North Thames River, approximately 200 km (120 mi) from both Toronto and Detroit; and about 230 km (140 mi) from Buffalo, New York. The city of London is politically separate from Middlesex County, though it remains the county seat.