Premier Foods and Yell are jostling for top spot in the FTSE 250, notching up gains in excess of 10%.Hovis bread and Branston Pickle owner Premier Foods has confirmed reports in the weekend papers that offers have been made for its meat free business that includes Quorn.Struggling Yellow Pages publisher Yell has brought in Tony Bates, former chief operating officer at telecoms operator Colt Group, to run its finance function.Pub companies that rent out premises to landlords rather than managing them centrally are mixed today. Enterprise Inns is among the 10 biggest risers, but Punch Taverns sits with the laggards.FTSE 250 - RisersPremier Foods (PFD) 18.15p +11.97%Yell Group (YELL) 15.97p +10.37%Booker Group (BOK) 50.30p +3.80%Homeserve (HSV) 445.80p +3.67%Howden Joinery Group (HWDN) 77.95p +3.04%Wellstream Holdings (WSM) 793.00p +2.52%Hays (HAS) 116.70p +2.46%SThree (STHR) 303.20p +2.43%Enterprise Inns (ETI) 114.00p +2.33%Bellway (BWY) 585.00p +2.01%FTSE 250 - FallersElementis (ELM) 99.20p -3.31%Punch Taverns (PUB) 84.90p -3.25%Devro (DVO) 242.80p -2.84%Inchcape (INCH) 309.80p -2.61%JD Sports Fashion (JD.) 810.00p -2.59%Ashtead Group (AHT) 107.20p -2.55%F&C Commercial Property Trust (FCPT) 91.70p -2.45%Go-Ahead Group (GOG) 1,096.00p -2.32%St. Modwen Properties (SMP) 174.00p -2.25%Stobart Group Ltd. (STOB) 148.50p -2.24%