The drop is the result of growing fears of a so-called "Hard Brexit" and that Britain will be forced out of the European single market during negotiations to leave the EU.
Al Jazeera’s UK correspondent, Barnaby Phillips reports from central London.
Democracy is an illusion! It’s become a political system fostered by the élite, for the élite, in order to fool the people that they have a stake in the system. In actual fact, they have virtually none. The whole political system in the modern era, despite having noble beginnings, is now used to benefit the few at the expense of the many. – Mark Alexander, June 29, 2018