brighton england opposition leader jeremy corbyn tell prime minister theresa may wednesday step aside make way labour party lead britain brexit talk say leftist ideas political mainstream take stage party annual conference stand ovation chant oh jeremy corbyn leftist leader write lawmakers drive party unelectable territory say labour ready power corbyn keen press home advantage may struggle unite party britain negotiations leave european union keep position face threat conservatives forgive loss parliamentary majority june election call predictions june large increase labour vote since 1945 achieve labour best vote generation result put tories conservatives notice labour threshold power corbyn say speech yes quite well enough remain opposition become government-in-waiting message country could clear labour ready labour close gap opinion poll stand roughly level conservatives put within sight win election conservatives say plan call vote anytime 2022. party dependent support small northern irish democratic unionist party dup majority parliament however far little appetite conservative party hold early election clear frontrunner replace may party deal dup however could hurt trade spat involve canadian planemaker bombardier northern ireland large manufacture employer conservatives want open way corbyn whose promise end austerity many voters particularly young focus anger deadly fire west london call government see servant people global corporations corbyn tap discontent britain wide trend see across western europe dominance traditional party beliefs increasingly challenge aid work belief may force early election britain leave eu march 2019 party start develop policies ready introduce swiftly feel like feel like feel like government frustrate thing yet say chris howes 18 year-old party activist central england ready whenever election come discount pursue critics say policies hark back 1980s labour lose power conservatives corbyn say britain ready change party ready move along leftist route add policies renationalization end university tuition fee increase public spend say would bring house policy make sure local councils would win ballot exist tenant leaseholders redevelopment plan could go ahead need build still broad consensus around priorities set election make case compassion collective aspiration say political mainstream turn table may june election say corbyn would lead coalition chaos vote corbyn say cabinet top minister ones fail far negotiate eu one rag-tag cabinet spend time negotiate eu cliff-edge brexit risk become reality say labour make clear britain stay within basic term single market customs union limit transition period labour also divide issue brexit however london mayor sadiq khan prominent member party say newspaper interview tuesday would back hold second referendum whether leave eu position party suggest far corbyn tell members power labour would pursue job first brexit one guarantee unimpeded access single market simple message cabinet britain sake pull together make way 'political mainstream corbyn say britain 's labour ready government