'Ceeya Ceefax' ran the Sun's headline as this week's official switchover to digital TV spelt the end of the television-based information and news service. Checked weekly at its peak in the Nineties by around a third of the British population, the retro news pages updated its last flight details, that day's weather and then disappeared from our screens forever... Time for a little nostalgia? Barely. A straw poll round the office offered up the not-too-startling revelation that most of us presumed it had ended years ago. How on earth had it survived this long in the age of Google?