** Tool & equipment rental co HSS Hire falls as muchas 8.7 pct after reports lower operating margins
** H1 revenue +13.5 pct to 166.2 million stg
** JPMorgan says slip in adj EBITDA margin reflects thechanged mix with lower-margin OneCall and Training accountingfor much of the growth; rates "underweight"
** Broker sees pressure on EBITDA margin, cuts adjustedEBITDA estimates by 2 pct to 77.4 mln stg in 2016 and by 3 pctto 82.4 mln stg in 2017
** Share worst performer on FTSE All Share Support ServicesIndex