Investors have a strong appetite for Cranswick today after the pork products supplier said it has had a "positive" first half, with turnover up 8% at the meat supplier, or 12% adjusted for the sale of its cooked meats business.But elsewhere in the sector, Premier Foods is left untouched after gains yesterday when it said offers have been made for its meat free business that includes Quorn.In other sector, travel group Thomas Cook is up in sympathy with peer TUI after the latter's positive trading update. FTSE 250 - RisersComputacenter (CCC) 316.10p +5.37%easyJet (EZJ) 386.40p +4.46%Heritage Oil (HOIL) 312.90p +4.30%Pace (PIC) 189.80p +4.29%Homeserve (HSV) 459.60p +3.98%Thomas Cook Group (TCG) 179.70p +3.87%Cranswick (CWK) 848.00p +3.79%SIG (SHI) 100.80p +3.70%SVG Capital (SVI) 176.00p +3.41%Enterprise Inns (ETI) 119.10p +3.39%FTSE 250 - FallersPremier Foods (PFD) 17.03p -4.75%Yell Group (YELL) 15.02p -3.10%TalkTalk Telecom Group (TALK) 142.60p -2.99%Elementis (ELM) 100.20p -2.72%JKX Oil & Gas (JKX) 315.40p -2.50%Robert Wiseman (RWD) 312.80p -2.10%St James's Place (STJ) 283.10p -1.56%BBA Aviation (BBA) 187.10p -1.53%Howden Joinery Group (HWDN) 76.85p -1.47%Ferrexpo (FXPO) 311.80p -1.39%