Recruitment firm Hays leapt into the top spot after it posted a 12 per cent actual increase in group net fees for the quarter ended March 31st. As a result the firm expects full-year operating profit to be towards the top of the current market estimates. Egyptian gold miner Centamin rose strongly after seeing total production grow 9% in the first quarter despite strike activity during the period. Sector peer Petropavlovsk pulled out of the tail-spin it has been in since the start of February after the company announced a sharp increase in gold production in the first quarter. High street retailer JD Sports Fashion said its margins are under pressure as even fashion-conscious consumers are looking for bargain prices on designer-labelled products. "Margins remain under pressure as consumers continue to be offer driven," admitted Peter Cowgill, Excecutive Chairman of JD Sports. FTSE 250 - RisersHays (HAS) 88.95p +9.48%Cable & Wireless Worldwide (CW.) 35.84p +8.97%Morgan Crucible Co (MGCR) 332.80p +6.29%Ocado Group (OCDO) 111.70p +6.08%Sports Direct International (SPD) 289.60p +5.96%Centamin (DI) (CEY) 66.80p +5.70%Ashtead Group (AHT) 251.10p +5.68%New World Resources A Shares (NWR) 432.90p +5.48%Salamander Energy (SMDR) 235.40p +5.32%Ferrexpo (FXPO) 296.10p +5.04%FTSE 250 - FallersAfrican Barrick Gold (ABG) 351.90p -5.07%Dixons Retail (DXNS) 17.13p -3.76%JD Sports Fashion (JD.) 773.00p -3.25%Ruspetro (RPO) 189.90p -2.91%Betfair Group (BET) 845.00p -2.26%British Empire Securities & General Trust (BTEM) 409.30p -1.75%Hiscox Ltd. (HSX) 397.30p -1.68%Marston's (MARS) 97.00p -1.42%Dairy Crest Group (DCG) 314.20p -1.38%JPMorgan Russian Securities (JRS) 552.50p -1.34%NR