Henderson Group, a second tier fund manager, pleased investors with a small but 'solid' profit following a volatile half year, prompting an increase in the interim dividend. Egypt-focused gold miner Centamin which has stuck with its production guidance after second quarter output hit record levels. Meanwhile, Scottish distribution firm John Menzies was out of favour after seeing revenues fall in the first half as the firm was hit by tough economic conditions and a weak euro. Also heading lower, platinum group metals (PGMs) producer Lonmin was leading the fallers on the second-tier index after reporting a "serious and ongoing outbreak of violence" at its West Marikana mine operations in South Africa, killing seven Lonmin workers and two policemen. FTSE 250 - RisersHenderson Group (HGG) 108.80p +3.13%BH Macro Ltd. EUR Shares (BHME) € 19.16 +3.01%Savills (SVS) 385.10p +2.86%Phoenix Group Holdings (DI) (PHNX) 499.10p +2.53%Galliford Try (GFRD) 624.50p +2.38%Barr (A.G.) (BAG) 448.50p +2.37%Stobart Group Ltd. (STOB) 122.30p +2.34%Kier Group (KIE) 1,293.00p +2.13%Millennium & Copthorne Hotels (MLC) 483.00p +2.11%Catlin Group Ltd. (CGL) 456.30p +2.08%FTSE 250 - FallersAvocet Mining (AVM) 88.10p -5.17%Lonmin (LMI) 706.50p -4.66%Kenmare Resources (KMR) 38.80p -4.06%Ruspetro (RPO) 148.50p -2.30%Essar Energy (ESSR) 109.70p -1.97%Dunelm Group (DNLM) 579.50p -1.78%Aquarius Platinum Ltd. (AQP) 36.70p -1.61%TUI Travel (TT.) 201.70p -1.56%Howden Joinery Group (HWDN) 142.30p -1.52%Cape (CIU) 193.00p -1.33%NR