Original sentence: Those who support Brexit argue that leaving the EU single market and customs union would allow the UK to craft and enter into it's own free trade agreements with other countries and long term would benefit the UK by removing the trade limitations imposed by the EU on its members.Withdrawal has been advocated by Eurosceptics, both left-wing and right-wing, while pro-Europeanists, who also span the political spectrum, have advocated continued membership and maintaining the customs union and single market, citing that the UK economy will experience a recession and lack stability if the UK leaves the EU's single market
Edited sentence: Withdrawal has been advocated by Eurosceptics, both left-wing and right-wing, while pro-Europeanists, who also span the political spectrum, have advocated continued membership and maintaining the customs union and single market