I have found that certain brews are worse than others. Ridley's used to be a real fart-maker when it was still brewed at Hartford End, and about 30 years ago I recall a beer called Webster's, which was brewed in Bradford, I think, which was also a cause of flatulence. Mrs. Wow ad I attended some friends' wedding in the late 1970s and Webster's was on at the reception as the only ale. I kept having to go for a walk to let fly so as not to upset the other wedding guests.