(TheDrum) - Drinks giant Diageo has apologised "unreservedly" to BrewDog after it was accused of 'blackmailing' the Scottish brewery out of a drinks industry award. Aberdeen-based BrewDog had earlier today posted an explosive blog - Diageo Screws BrewDog - which implied that Diageo had abused its power as a sponsor of the British Institute of Inkeeping ceremony to cheat Brewdog out of an award.