From the Telegraph:
Yesterday, it was a press event.
With a rumble that turned into a roar, a sound not heard at Bletchley Park for more than half a century, the machine that was at the heart of Britain’s wartime code-breaking triumph began to work again.
The operation of the bombe was likened by the men and, mostly, women who worked on it to a vast collection of knitting needles, but its sound was also the first hint of the computerised world in which we now live.
Yesterday, a fully-functioning recreation of the bombe was switched on for the first time, by re-enactors in period dress, bringing back to life the great-great uncle of the PC.