Shares in ITV are higher after the troubled broadcaster confirmed the appointment of former Tory MP Archie Norman as its new non-executive Chairman.He will take up the role in January 2010, when current executive chairman Michael Grade, will stand down and John Cresswell will become interim chief executive.Computer services group Dimension Data is up after it reported lower full-year figures but said it is encouraged by the recent stabilisation in its end markets.Investors are taking a punt on Ladbrokes after the bookmaker appointed Trinity Mirror chief executive Sly Bailey as one of two new non-executives.Among the fallers are the Restaurant Group, the company behind the Frankie & Bennie's and Chiquito chains, which said it is confident of meeting its expectations for the full year but warned that conditions will remain tough.Housebuilders Persimmon, Taylor Wimpey and Barratt Developments are in the bottom 10 after Bovis, which is only slightly lower said it has seen further signs of stabilisation in the housing market and expects more pricing stability and modest growth in mortgage availability in 2010.FTSE 250 - RisersAquarius Platinum Ltd. (AQP) 337.80p +7.92%ARM Holdings (ARM) 172.10p +7.76%Dimension Data Holdings (DDT) 79.75p +6.69%Ferrexpo (FXPO) 185.50p +6.61%ITV (ITV) 55.25p +6.35%Enterprise Inns (ETI) 129.70p +5.96%Ladbrokes (LAD) 132.60p +4.41%Kesa Electricals (KESA) 159.90p +4.31%Interserve (IRV) 238.90p +4.05%DSG International (DSGI) 38.49p +4.03%FTSE 250 - FallersLancashire Holdings (LRE) 426.90p -14.05%Avis Europe (AVE) 26.05p -3.52%Persimmon (PSN) 475.20p -2.68%Taylor Wimpey (TW.) 41.50p -2.35%Restaurant Group (RTN) 191.50p -2.30%Morgan Sindall (MGNS) 598.50p -2.29%Barratt Developments (BDEV) 138.50p -2.26%Euromoney Institutional Investor (ERM) 403.30p -2.11%Redrow (RDW) 149.90p -1.96%HSBC Infrastructure Company Ltd. (HICL) 112.70p -1.91%