So what IS the difference between barley wine and old ale?

I see Wikipedia reckons that “According to Martyn Cornell, ‘no historically meaningful difference exists between barley wines and old ales’.” Do I think that? You’ll be unshocked to learn that my beliefs are actually considerably more complex. One problem is that in the real world, beer styles such as Burton Ale that have been called… Read More So what IS the difference between barley wine and old ale?