Six years after it was re-launched in 2009, Glendronach 15 had become one of the most re-purchased whiskies on our shelves. As the unequivocal bargain in its genre, worldwide demand outstripped supply and a three year drought made its absence keenly felt. Finally, it's back. As of 2016, Glendronach has been under the ownership of US corporate spirits giant, Brown Forman. Hence, the question on everyone's lips is whether the latest Revival would maintain the standard set by Billy Walker. Master Blender, Rachel Barrie has released the 15 year old with the distillery's signature Spanish oak maturation, only this time in both Pedro Ximénez and Oloroso sherry casks (the previous incarnation was 100% oloroso). Consequently, it's not quite fair to compare it to the previous Revival as the formula has changed.