london british foreign secretary boris johnson set plan glorious brexit saturday anger colleagues reignite speculation would challenge prime minister theresa may leadership conservative party may due set vision brexit speech italian city florence friday johnson publish 4,300-word newspaper article roam well beyond ministerial brief case go beyond approach set government britain say would pay access european market future european union country borrow invest infrastructure reform tax code set immigration level see fit prominent brexit campaigner last year referendum johnson also repeat controversial claim government would 350 million pound 476 million good per week outside eu friends must report least people woefully underestimate country johnson write daily telegraph think brexit go happen tell country succeed new national enterprise succeed mightily glorious future colleagues anger time johnson article publish day bomb injure 30 people train late add twitter look forward pm florence speech behind theresa glorious brexit favorite grassroots members conservative party johnson expect challenge leadership may gamble away parliamentary majority june election need call instead publicly pledge loyalty time newspaper report early week johnson believe since sideline may prepare compromise divorce bill eu ease negotiations would expect pay access market would expect pay access write article make reference transition period government expect negotiate yes settle account take back control roughly 350 million pound per week say would fine thing many us point lot money go nhs health service campaign johnson travel around britain bus emblazon slogan suggest britain send 350 million pound week eu figure reject inaccurate experts money would good spend nhs saturday article also include johnson belief britain need leave eu many young people 12 star lipstick face begin split allegiances europe country opposition labour leader jeremy corbyn say saturday comment also lay bare conflict within may government cut grind beneath prime minister authority source within down street say johnson view well know see pm speech next week government unite determination make opportunities successful future outside eu colleagues criticize time article come around two hours may put britain high threat level critical mean attack may imminent day terror attack britons maim hours threat level raise thoughts service say ruth davidson popular leader conservatives scotland tan former adviser may say time astonish self-serving disloyal real pm raise threat level meanwhile guy want replace issue prelude resignation save face 350 million pound hmm uk 's boris johnson reignite leadership speculation brexit plan