london prime minister theresa may say sunday would derail leave european union lay groundwork difficult meet week try unite divide cabinet behind vision post-brexit britain may applaud european union leaders brussels friday secure agreement move previously-deadlocked talk forward onto topic interim long-term trade arrangements progress go way ease concern businesses investors fear britain could crash bloc without exit deal may fragile government could collapse pressure deliver brexit amid noise get job may write sunday telegraph message today clear derail fundamental duty deliver democratic british people may expect difficult exchange week senior minister discuss so-called end state brexit negotiations first time since britain vote leave eu referendum june 2016. type long-term relationship country eu vex question every level britain include within may cabinet want keep close tie eu others want radical divorce brussels mindful need keep side happy may far plot careful path may say want wide-ranging free trade deal eu outward-looking trade policy largely steer clear contentious issue whether britain stay align eu trade rule future role european court meet expect take place monday tuesday likely force issue open one key pro-brexit voice cabinet foreign minister boris johnson set view ahead meet warn may britain must avoid become subordinate eu need something new ambitious allow zero tariff frictionless trade still give us important freedom decide regulatory framework laws things distinctive way future tell sunday time newspaper say mirror eu laws would leave britons ask point achieve would go member state vassal state brexit derail say may ahead crunch cabinet meet