london british transport minister chris grayling say sunday think britain would leave european union without negotiate deal bloc negotiations deadlocked prime minister theresa may government eu secure divorce settlement agreement future relations raise prospect britain could walk away talk without deal think get position grayling lead campaigner leave least year referendum tell bbc ask consequences leave without deal would grayling also say think danger brexit stop airlines able fly country say believe britain would end remain member european aviation safety agency oversee safety legislation view end negotiations would expect case say ask whether britain would remain member organization transport minister n't think britain leave eu without deal