just noticed this:
William Grant's Scotch Whisky (700ml) in Tesco | mySupermarket

Description: The family reserve.
Product of Scotland.
40% Vol.

The Grant family selects, blends and matures the finest Scotch whiskies, including their own malts Glenfiddich and The Balvenie to give Grant's its deliciously complex taste and long, smooth finish.

currently compare the market:
ASDA: £13.97
Sainsbury's: £15.49
Ocado: £15.49