Specialised technical products and services provider Diploma was out of favour after saying that underlying revenue growth was just five per cent against a strong prior-year comparative. Trading systems developer Fidessa was also a heavy faller after top line growth was below forecasts in the first half, as falling sales in Europe dampened revenues at the group level. Revenues rose 3% during the six months to June 30th from £137m to £141.3m, short of Peel Hunt's £144m estimate. ? Ladbrokes also took a hit after the bookmaker confirmed that its Product Director has been relieved of his executive duties. Meanwhile, investment trust titan Foreign and Colonial rose after saying it has increased its dividend by a third as it makes good on its promise to be more generous with dividend payments. FTSE 250 - RisersDevro (DVO) 295.00p +6.12%Avocet Mining (AVM) 76.00p +5.26%Cairn Energy (CNE) 289.40p +5.24%Dixons Retail (DXNS) 16.84p +5.12%Home Retail Group (HOME) 77.30p +4.25%International Personal Finance (IPF) 283.90p +3.99%Michael Page International (MPI) 360.30p +3.39%Stobart Group Ltd. (STOB) 120.80p +3.25%Talvivaara Mining Company (TALV) 146.40p +3.10%EnQuest (ENQ) 111.20p +2.68%FTSE 250 - FallersDiploma (DPLM) 418.90p -6.08%Fidessa Group (FDSA) 1,417.00p -5.53%Ladbrokes (LAD) 154.90p -4.68%Computacenter (CCC) 351.50p -3.99%Redrow (RDW) 124.80p -3.85%Senior (SNR) 190.60p -3.83%Petra Diamonds Ltd.(DI) (PDL) 127.00p -3.50%Barratt Developments (BDEV) 135.10p -2.60%COLT Group SA (COLT) 114.60p -2.13%Bellway (BWY) 824.50p -2.08%NR