Amongst the beers tucked away at the back of one of my many beer cupboards I have a bottle of Roger and Out from the Frog and Parrot brewpub. The label on the back of it proudly boast of it being the world's strongest beer.
No alcohol content is listed, just the Original Gravity of 1.125. No champagne yeast or freeze distillation was used, it was just a very strong beer.
It tasted foul too. I wonder if the years have improved it...