Brazilians go to polls with Lula slight favourite to oust far-right Bolsonaro

Polls - which underestimated incumbent's vote in first round - give Workers' party leader 52% to 48% advantage

Brazilians head to the polls on Sunday in their most important election for years, with leftist challenger Luiz Inacio Lula da Silva the slight favourite to put an end to four years of destructive government by the far-right president Jair Bolsonaro.

Opinion polls on the eve of the ballot gave Lula, as the Workers' party candidate is known, a lead of between four and eight percentage points.