PoliticsFormer U.K. Commons Speaker Bercow Defects to Labour: ObserverFacebookXLinkedInEmailLinkGiftExpandJohn BercowPhotographer: Dan Kitwood/Getty ImagesFacebookXLinkedInEmailLinkGiftGift this articleContact us:Provide news feedback or report an errorConfidential tip?Send a tip to our reportersSite feedback:Take our SurveyNew WindowFacebookXLinkedInEmailLinkGiftBy Erin McClamJune 19, 2021 at 7:20 PM UTCBookmarkSaveLock This article is for subscribers only. Sign up for our Beyond Brexit weekly newsletter, follow us @Brexit and subscribe to our podcast.John Bercow, the former Conservative speaker of the House of Commons, has switched his allegiance to the Labour party, according to an interview with the Observer newspaper.