The fabled 'Malt Mill' from the movie isn't quite the myth you'd expect btw.
Learned about this years back whilst systematically destroying and rebuilding Lagavullin in Islay.
Prior to the current still there was another one and it produced Malt Mill which was never matured to a Single (ie spent the required minimum three years in a cask to be classed a single malt, although why anyone would want to drink a malt that's only three years old with a kick that would burn yer throat oot is beyond me
).
It's exsistance was to be used an an ingreient in the blend market, remember Single Malt Whisky as a brand wasn't as popular then as it is now, blends were (actually still are, pardon the pun) king, mores so way back then.
No bottles or casks were kept, why would you it wasn't getting matured, and thought lost until a hand marked label bottle turned up in some Islay attic (obviously stashed to stop the wife cleaning the windaes wi it).
Crackin wee story to the movie, gritty Loach inner city life at the start, mixed with surreal whisky world get rich scheme. Well worth a viewing.
Feck fancy a wee dram now but still at work, ah well evening time unwind is on the cards tonight then.