UPDATE 1 — Flavio Bolsonaro slightly leads Lula in Brazil runoff, Quaest poll shows

(Adds more details and context in bullets 1-4) SAO PAULO, Oct 14 (Reuters) — Brazilian Senator Flavio Bolsonaro was seen slightly ahead of President Luiz Inacio Lula da Silva heading into the October 25 presidential runoff, a Quaest poll showed on Wednesday. The right-wing senator, the eldest son of former President Jair Bolsonaro, would receive 46% of the vote compared with 44% for the leftist Lula, according to the poll. It is the first Quaest poll after the first-round vote earlier this month, in which the younger Bolsonaro surprisingly led Lula The poll's result still represents a technical tie as the poll's margin of error is plus or minus 2 percentage points 9% of the respondents said they would cast a blank or null vote or intend not to vote, while undecided voters made up 1%, the poll showed Quaest surveyed 2,154 people between October 10-13 (Reporting by Andre Romani in Sao Paulo; Editing by Fernando Cardoso) ((Andre.Romani@thomsonreuters.com; 11 991314109;11 56447500;)