Thanks for the link. I thought the idea that carbon dioxide used with cask breathers would dissolve in the beer and make it fizzy had been properly debunked? [Is this what you mean about him getting a lot of it wrong?] I'm sure I've seen a thread in Discourse suggesting that Camra were wrong to exclude pubs using a cask breather and that in fact in blind tastings beers from barrels kept using a cask breather came out better than ones kept under the recommended system.