The British pound extended losses on Friday to drop more than one percent against the dollar after Prime Minister Boris Johnson warned that a no-deal Brexit was "very, very likely". At 1312 GMT, the pound slumped by 1.2 percent to hit $1.3135, the lowest level since mid November, while the euro rose by almost 1.0 percent to reach 92.20 pence -- its the highest since September. bp-rfj/wai