Pest control and hygiene giant Rentokil Initial gained after raising its interim dividend by 4.5 per cent on the back of strong progress in the second quarter.Bank of Georgia Holdings rallied after posting record first-half revenues driven by retail, corporate and investment banking.Hochschild Mining snapped Tuesday's high after UBS issued a 'neutral' rating, saying the company offers "attractive operating leverage should gold and silver prices rebound".Countrywide declined following news private equity investors Apollo and Oaktree had reduced their stake in the property group.FTSE 250 - RisersRentokil Initial (RTO) 104.10p +7.26%Bank of Georgia Holdings (BGEO) 1,905.00p +6.42%Imagination Technologies Group (IMG) 264.40p +6.40%PayPoint (PAY) 1,200.00p +4.80%Dialight (DIA) 1,315.00p +3.87%Synthomer (SYNT) 223.70p +3.81%Dechra Pharmaceuticals (DPH) 696.00p +3.57%Interserve (IRV) 553.00p +3.36%Henderson Group (HGG) 178.40p +3.06%Beazley (BEZ) 213.70p +2.59%FTSE 250 - FallersHochschild Mining (HOC) 247.70p -6.49%Computacenter (CCC) 496.50p -5.79%Countrywide (CWD) 570.00p -4.52%Balfour Beatty (BBY) 241.00p -3.64%Direct Line Insurance Group (DLG) 224.00p -3.57%Centamin (DI) (CEY) 37.37p -3.56%Moneysupermarket.com Group (MONY) 160.10p -3.55%Taylor Wimpey (TW.) 106.60p -3.18%Kazakhmys (KAZ) 296.80p -3.07%Redrow (RDW) 238.30p -2.89%RD