Outsourcing services group Mitie fell after warning that it expects full-year profits to be pushed slightly lower than forecast by margin pressures in the homecare and social housing businesses.Petrofac was in the red following a downgrade from Canaccord Genuity who dropped their rating from 'buy' to 'hold', claiming that the stock is overvalued.Vedanta Resources dipped as analysts at Deutsche Bank lowered their price target on the stock from 865p to 740p. Meanwhile, fellow miners Centamin and Kaz Minerals were making solid gains.Support services group Serco topped the risers after agreeing the £2.5m sale of its Australian Great Southern Rail Business.Pace was boosted by an upgrade from Liberum Capital to 'buy' in a research note. RisersSerco Group (SRP) 136.90p +3.71%Pace (PIC) 346.60p +2.85%Greencore Group (GNC) 321.10p +2.82%SIG (SHI) 202.40p +2.53%Senior (SNR) 326.30p +2.38%Cable & Wireless Communications (CWC) 61.40p +2.33%Virgin Money Holdings (UK) (VM.) 396.40p +2.30%Spire Healthcare Group (SPI) 372.00p +1.92%Polymetal International (POLY) 579.00p +1.76%Centamin (DI) (CEY) 57.75p +1.58%FallersMitie Group (MTO) 269.60p -7.80%Vedanta Resources (VED) 502.50p -5.01%Telecom Plus (TEP) 881.00p -4.45%Go-Ahead Group (GOG) 2,310.00p -4.39%Workspace Group (WKP) 852.00p -3.24%Premier Oil (PMO) 133.40p -2.98%Renishaw (RSW) 2,500.00p -2.87%Ophir Energy (OPHR) 135.50p -2.80%Countrywide (CWD) 515.50p -2.74%Ashmore Group (ASHM) 285.90p -2.69%