Computer Managment Group Plc, the privately-held London based computing services company, enjoyed an interim pre-tax profit rise of 54.5% at UKP6.8m on turnover up by 13.3% at UKP69.7m, earnings per share by 59.1% at 25.3 pence and margins by 2.7% to 9.5%. The company plans to float on the London Stock Exchange next April, subject to market conditions. Its business is primarily in the UK and continental Europe, particularly the Netherlands with 63% of group turnover. It also has mobile telecommunication projects in Russia, Poland, Germany and Poland.