BUZZ-Rentokil: hits 12-yr high as weaker sterling boosts profits
** Pest control co Rentokil hits a 12-year high after saying the devaluation of sterling following the UK referendum will add £25-30 mln to 2016 earnings
** Co derives 87 pct of revenues from overseas, according to Reuters data
** Rentokil among top risers and most traded by average volumes on Stoxx 600
** Sterling down 13.5 pct since June 24 to a 31-year low