By Reuters UK,
November 25, 2009 at 7:41 AM
* Underlying pretax profit 114.4 mln stg vs 144.9 mln * Revenue declines 18 pct to 3.6 bln stg * Dividend unchanged at 11.1 pence (Adds details) LONDON, Nov 25 (Reuters) - British platinum refiner Johnson Matthey (JMAT.L) said its first-half pretax