Richard has never declared a conflict of interest vis a vis, his (supposedly possible potentially) significant shareholding in Brewdog. Could posting information about them here indirectly benefit him financially?
He has been seen drinking this beer on occasion, though my understanding is that he prefers American things like Sierra Pale Ale? Or all that small batch microbrewery stuff we don't get over here unless you want to pay through the nose.
There would be a potential conflict of interest if there were any facts that potentially supported any of the above concerns. I'm not suggesting that there is one, but it's entirely possible and would constitute a gross ethical breach of some sort.