FTSE 250 movers: Imagination extends gains

Graphics chip technology developer Imagination Technologies is 7% higher, extending gains from Tuesday when it signed a license agreement with European device manufacturing giant STMicroelectronics.Public transport group Go-Ahead isn't too far behind after raising full year guidance.Heading the other way is industrial engineer Charter after earnings came in at the lower end of analysts' forecasts, with a weakness in Europe providing a drag.Also missing forecasts was support services specialist Rentokil as the cold weather in December added to the woes of its parcels delivery business City Link.Serviced office specialist Regus has been given a boost by an RBS upgrade to 'buy', from 'hold', as the broker believes earnings can surpass a previous peak.FTSE 250 - RisersImagination Technologies Group (IMG) 424.60p +6.87%Go-Ahead Group (GOG) 1,404.00p +6.69%Moneysupermarket.com Group (MONY) 93.15p +4.55%Northumbrian Water Group (NWG) 325.40p +3.27%QinetiQ Group (QQ.) 130.60p +3.08%Hochschild Mining (HOC) 547.00p +2.72%Lancashire Holdings (LRE) 610.50p +2.69%Gem Diamonds Ltd. (DI) (GEMD) 306.90p +2.64%Thomas Cook Group (TCG) 200.70p +2.61%Regus (RGU) 111.80p +2.38%FTSE 250 - FallersCharter International (CHTR) 729.00p -7.43%Rentokil Initial (RTO) 92.60p -5.51%Paragon Group Of Companies (PAG) 183.10p -3.12%EnQuest (ENQ) 131.50p -3.02%Domino's Pizza UK & IRL (DOM) 499.80p -2.76%IG Group Holdings (IGG) 444.70p -2.54%Cookson Group (CKSN) 658.50p -2.44%Tate & Lyle (TATE) 585.00p -2.42%Debenhams (DEB) 62.25p -2.05%Centamin Egypt Ltd. (CEY) 136.70p -1.94% Rentokil Initial