Pound set for biggest one-day rally since 2008 on PM's Brexit speech

The pound has surged by more than three cents on Theresa May's Brexit speech putting it on course for its biggest one-day rise against the US dollar since 2008. Sterling rocketed after the Prime Minister's vision for exiting the European Union appeared less "hawkish" than had been expected - and floated the possibility of an associate membership of the tariff-free customs union. Sterling leapt by as much as 2.5% to match the scale of one-day gains last seen in 2008 and overtake the size of a ral