The Ladyburn distillery was an extension of the Girvan distillery itself built in 1963 by William Grant & Sons Ltd. Ladyburn malt whiskey distillery was established in 1966 with the addition of two pot stills. The portion of the malt distillery was closed in 1975 and demolished in 1976.
The independent bottlers Signatory Vintage and Wilson and Morgan have Ladyburn single malt released under the name "Ayrshire", after the Council area of Scotland where Girvan was found.
Source: Wikipedia