South Korea’s presidential frontrunner Lee Jae-myung increased his lead over ruling party nominee Kim Moon-soo, according to the latest opinion poll, another sign that he is well placed to triumph in next week’s election if the conservative vote remains split.

South Korea's liberal frontrunner for president Lee Jae-myung was leading his main conservative rival Kim Moon-soo by more than 10 percentage points in an opinion poll issued on Tuesday, though the race had tightened a week ahead of the election.

A Gallup poll released Tuesday indicates South Korean opposition leader Lee Jae-myung is the clear frontrunner to become the country's next president, with less than a week to go until the elections.Gallup put Democratic Party leader Lee as the clear frontrunner,