LONDON (Reuters) - Sterling GBP=D3 tumbled on Monday to 20-month lows versus the dollar as investors took fright as Prime Minister Theresa May's decision to abandon a parliamentary vote on her Brexit deal.
The pound, down less than 1 percent before May outlined to lawmakers why she had postponed Tuesday's planned vote, fell as much as 1.6 percent to $1.2521 GBP=D3, its weakest since April 2017.
The British currency also sank versus the euro, down 1.5 percent at 90.875 pence EURGBP=D3 and its lowest since late August.
The domestically focussed FTSE 250 index .FTMC fell 1.5 percent to the lowest since December 2016 and ten-year British government bond yields fell 7.5 basis points to 1.19 percent, the lowest since mid-August GB10YT=RR.
May said on Monday she was delaying a planned vote in parliament on her Brexit deal as it was set to be rejected “by a significant margin”.
Reporting by Tommy Reggiori Wilkes and Helen Reid; Editing by Saikat Chatterjee