Pest control and hygiene giant Rentokil Initial jumped over 10 per cent after it revealed robust 2012 results, beating analyst expectations. Adjusted pre-tax profits came to 191m pounds, a 10.1 per cent year-on-year rise. Ocado continued to rise one day after posting a jump in sales and unveiling a potential tie-up with supermarket chain Morrison. Meanwhile, Petropavlovsk fell after Citi downgraded its target price to 274p from 377p. Synthomer, which works in the coatings, construction, textiles, paper and rubber-glove markets, fell after it said full year sales slipped 12.4% from £1,268.8m to £1,111.8m as volumes fell 5.0%, affected by weak demand in Europe and North America. FTSE 250 - RisersRentokil Initial (RTO) 99.95p +10.44%Centamin (DI) (CEY) 57.30p +7.10%Ocado Group (OCDO) 182.00p +7.06%Homeserve (HSV) 235.40p +5.42%Perform Group (PER) 491.00p +4.91%Alent (ALNT) 406.00p +4.91%Computacenter (CCC) 506.50p +4.52%Home Retail Group (HOME) 155.50p +4.43%Ted Baker (TED) 1,301.00p +4.25%Playtech Ltd. (PTEC) 634.50p +3.51%FTSE 250 - FallersPetropavlovsk (POG) 239.00p -3.75%Investec (INVP) 489.60p -2.86%Synthomer (SYNT) 218.70p -2.58%Premier Farnell (PFL) 219.80p -2.48%Man Group (EMG) 101.30p -2.41%CSR (CSR) 474.60p -2.37%Interserve (IRV) 485.00p -2.04%African Barrick Gold (ABG) 239.50p -1.96%Inmarsat (ISAT) 682.50p -1.94%BH Global Ltd. USD Shares (BHGU) 11.87 -1.90%NR