Getty Boris Johnson will ask for a Brexit delay this week if he fails to secure a deal. The UK's Brexit Secretary Stephen Barclay confirmed that Johnson would comply with legislation requiring him to seek a third extension if he can't secure a deal. The admission comes as negotiators in Brussels try to reach an agreement in time for Thursday's European Council summit. However, EU sources suggest a delay is now inevitable, whether a deal is agreed in principle or not. Visit Business Insider's homepage for more stories. Boris Johnson will write to the European Union requesting that Brexit is delayed, if he fails to agree a deal with Brussels by Saturday, a senior member of his government has confirmed. The prime minister has repeatedly insisted that there are "no circumstances" under which he would allow Brexit to be delayed, tweeting last week that there would be "no delay."See the rest of the story at Business InsiderNOW WATCH: How to properly fold the American flag, according to presidential candidate Rep.