Ale-lover and brewery owner Peter Fowler of Oxfordshire took up a friend's challenge and produced what is certifiably the bitterest brew on tap today: The Hop. It registers 323 International Bittering Units (IBUs), which beats the nearest record-holder (an American IPA) by nearly 50%.
• Read the full story: Ale lover brews world's bitterest beer at Telegraph.co.uk
Related: Beer Guide: What Are Hops?
(Image: Hop Growers of America)