By The Horns Beers (cans/kegs) is Vegan Friendly

Company email (June 2018)
"Our canned and kegged beer is not fined with isinglass and therefore suitable. Our Cask ale is not suitable for vegans as we use finings for commercial reasons"

Company email (May 2013):
"We don't use any animal ingredients. But we do fine our beers with Isinglass. However, the beers on offer
at Londons Brewing are racked bright, meaning they have been racked from the original cask(barrel) into a new cask(meaning they will have a minimal,if any, isinglass in them).

Sorry about that. I know it is always questionable whether any isinglass is actually present in the beer anyway, as it does coagulate and drop to the bottom; and consequently shouldn't get poured into a pint."