Secrets from the world of whisky, from the 60-year-old bottle that sold for £650,000 to the tipple you get at the supermarket

In the last 20 years, the world of whisky has exploded, being transformed beyond recognition.

What was once a croft industry in the Scottish Highlands and Islands has spread around the world. The Scots' craft has spread out across the world, from Ireland and Wales to Japan, India and beyond. In India alone, tens of millions of cases of whisky are made each year. And even the English have been getting on the act.

What's driven the change? How has the craft of whisky-making changed, if at all? And how have we gone from...