Nearly a year after its market debut, Cambridge Silicon Radio, Cambridge's latest star technology company, is still shining brightly, with exponential growth figures and a market capitalisation of £456m - 50 per cent higher than on float.

The company's float on the London Stock Exchange last February was a psychologically important event for Cambridge, breaking the initial public offering drought that followed the bursting of the technology bubble and reassuring investors that the "Cambridge phenomenon" is still working.