Regeneration specialist St Modwen tanked after proposing a placing to help fund its share in the development of the New Covent Garden Market in London. St Modwen intends to raise additional equity capital through a placing of up to 20m new ordinary shares of 10p each, representing around 9.99 per cent of the company's existing issued share capital. Housebuilder Redrow saw its shares fall after it warned the backdrop "remains challenging". Meanwhile, Chemicals company Elementis was leading the risers after reporting a 12% increase in earnings per share to 20.7p, the highest in the company's history. FTSE 250 - RisersElementis (ELM) 243.60p +6.94%Betfair Group (BET) 715.00p +3.62%Centamin (DI) (CEY) 54.90p +1.86%Enterprise Inns (ETI) 105.60p +1.64%Ultra Electronics Holdings (ULE) 1,676.00p +1.39%Bank of Georgia Holdings (BGEO) 1,377.00p +1.18%AZ Electronic Materials SA (DI) (AZEM) 374.80p +1.16%Hansteen Holdings (HSTN) 82.95p +1.16%Filtrona PLC (FLTR) 633.50p +1.12%Hochschild Mining (HOC) 378.90p +1.04%FTSE 250 - FallersSt. Modwen Properties (SMP) 248.00p -10.73%Sports Direct International (SPD) 405.00p -5.92%Redrow (RDW) 186.00p -5.01%Provident Financial (PFG) 1,462.00p -4.07%Man Group (EMG) 102.30p -3.94%National Express Group (NEX) 198.50p -3.69%New World Resources A Shares (NWR) 256.30p -3.65%Kenmare Resources (KMR) 35.38p -3.60%Afren (AFR) 140.10p -3.51%KCOM Group (KCOM) 79.10p -3.48%NR