King's Favourite was a 4 year old blended whisky produced by T & A McClelland Limited in Glasgow. 

T&A McClelland were founded by two brothers, Thomas and Andrew, who established the Bladnoch distillery in 1817. Their company was bought by Dunville in 1911 who closed Bladnoch in the 1930s (later selling it on), but continued to run the company as a blending firm. It was acquired by Stanley P. Morrison in 1970, who bottled a number of blends and "mystery" single malts under the T&A McClelland banner over the years.