*Shares in Maiden Group lost 11.8 per cent to 138p after the outdoor advertising company announced widening first half losses. It said the performance reflected the uncertain advertising climate and a major contract delay from Network Rail.*Anglo Asian Mining slumped 32 per cent to 61½p as the mineral explorer announced "unsatisfactory" results from its first drill hole in Azerbaijan.*DAT Group jumped 15.5 per cent to 41p. The mobile phone software company issued an upbeat statement and revealed it has raised £5.3m through a 30p a share secondary placing.*Shares in Brainspark rallied 111.1 per cent to 1.9p as the information technology incubator said the sale of its stake in Geosim Systems to a US private equity firm was imminent.*Croma Group plunged 24.3 per cent to 3.12p after a profit warning. The company, which specialises in surveillance and counter-surveillance equipment, also said it was in advanced negotiations to buy two separate private companies - deals it plans to fund by issuing shares.*Cornwell Management Consultants dropped 33 per cent to 83½p after it warned that full-year profits would be materially below expectations.*Market chatter suggested Alexandra, unchanged at 130½p, was about to strengthen its market position as Europe's number one supplier of corporate clothing and workwear with the £4.5m acquisition of de Baer, which provides Eurostar staff with their uniforms.*Tellings Golden Miller slid 10.5 per cent to 38½p as it cautioned that profitability at the coach and bus operator would be reduced.*ILX Group put on 8.3 per cent to 117p after the education and training company announced it was in acquisition talks. *SMC, the architectural business, was flat at 71½p despite speculation that an acquisition was imminent.*Clothing chain Peacock rose 0.3 per cent to 325p on talk the proposed management buy-out led by chief executive Richard Kirk could happen next week.*Desire Petroleum, the oil explorer that has been unable to begin drilling around the Falkland Islands because of a lack of suitable rigs, jumped 13.3 per cent to 29¾p on talk it could have secured a drilling platform mixed with bid rumours.*Celoxica, an Oxford University spin-out company that makes software for computer chips, gained 8.7 per to 34p on its first day of trading on Aim. The company rose £6.1m after a 31¼p a share placing.