UPDATE 1-LSEG in talks to buy Permira's Octus financial data group for about $3.5 billion

* LSEG confirms Reuters report of acquisition talks * Permira working with advisers to evaluate interest in Octus, sources say * Deal would be immediately accretive to group revenue growth, LSEG says

(The article has been published through a syndicated feed. Except for the headline, the content has been published verbatim. Liability lies with original publisher.)