Electronics components supplier Premier Farnell surged after seeing the year-on-year decline in its top line slow in the second quarter, as it sacrificed margin to protect market share. ?? Homewares retailer Dunelm rose after saying pre-tax profit climbed a better than expected 15.1% in the first half and while it remains cautious of the UK consumer environment it is confident in the future prospects of the business. The day after the much ballyhooed release of Apple's iPhone5, chip designer Imagination Technologies released a well-timed trading update in which it revealed its business momentum has continued in the new financial year. Nevertheless, shares fell sharply by the afternoon. ?? FTSE 250 - RisersPremier Farnell (PFL) 189.00p +10.01%Essar Energy (ESSR) 117.80p +8.97%Dunelm Group (DNLM) 664.50p +6.32%Barratt Developments (BDEV) 167.30p +5.35%Ruspetro (RPO) 109.50p +5.29%Persimmon (PSN) 768.50p +3.99%Ophir Energy (OPHR) 617.00p +3.70%SDL (SDL) 665.00p +3.58%Stobart Group Ltd. (STOB) 116.60p +3.37%Atkins (WS) (ATK) 688.00p +3.15%FTSE 250 - FallersImagination Technologies Group (IMG) 556.50p -8.77%Home Retail Group (HOME) 95.40p -4.02%Regus (RGU) 98.30p -3.63%Computacenter (CCC) 394.90p -3.42%Salamander Energy (SMDR) 188.30p -3.24%EnQuest (ENQ) 120.30p -2.75%Bumi (BUMI) 285.30p -2.66%Afren (AFR) 134.40p -2.18%Debenhams (DEB) 98.00p -2.00%Hochschild Mining (HOC) 446.60p -2.00%NR