UPDATE 3-UK bank RBS turns corner as first-quarter profit trebles
* Q1 net 1.2 bln stg vs company poll consensus of 200 mln * No plans to settle on 2008 rights issue * Will pay to retain staff affected by bonus cap * Taxpayers still sitting on 14 billion pound loss * Shares up 12 percent (Adds CEO comments on 2008 rights issue lawsuits
