A second Brexit referendum would be impossible to hold before the March 2019 exit date , according to experts at UCL . At least 24 weeks would be needed to organise the poll , including 12 weeks for Parliament to pass the relevant legislation and a 10-week campaign period . It said if Parliament began drawing up the legislation today, the process - including a two-week Christmas recess - would take the country up to 28 March next year. Given a two - week Christmas recess , if preparations did begin immediately , a vote would not be held until the end of March 2019 . Therefore , in the event of a second referendum , an extension of the Article 50 process would be necessary .
A second Brexit referendum would be impossible to hold before the March 2019 exit date , according to experts at UCL . At least 24 weeks would be needed to organise the poll , including 12 weeks for Parliament to pass the relevant legislation and a 10-week campaign period . Given a two - week Christmas recess , if preparations did begin immediately , a vote would not be held until the end of March 2019 . Therefore , in the event of a second referendum , an extension of the Article 50 process would be necessary .