I have just been to an intriguing event in Hanbury Street in Spitalfields, next door to Atlantis Paper and just off Brick Lane, where Rohan Silva, a young entrepreneur who used to work in 10, Downing Street has established a casual, serviced work space for hi-tech and digital start-up companies.   The architecture is industrial chic – Silicon Valley meets Brick Lane – with balloon windows onto the street, designed by Selgas Cano, a young Spanish practice which specialises in new work spaces (their own office is incarcerated in the woods).   I was told that key to the success of the project is proximity to good food.   Sadly, I missed the speech by the Chancellor of the Exchequer.