Enterprise Computers Group, formerly Systems Reliability Plc, is causing waves in the City with another share stake announcement: chairman Robert Evans increased his holding to 7.2% earlier this week, while Prudential Portfolio reduced its stake to 5.52%; the latest move comes from David Thompson who has acquired a 7.2% stake; both Evans and Thompson are from the Hillsdown stable, and while analysts mused, the mainframe services and personal computer box shifter saw its shares close at 18 pence, up from 12.5 pence at the begining of the week.