Joanna Shields, the head of Facebook's operations in Europe, is leaving the social network to join London's Tech City initiative.
The UK's Tech City has come of age with smartphone apps for iPhone and Android, fittingly created in the UK using UK tech for the UK government.
Firebox is the latest big name to announce its involvement with the 'Silicon Roundabout' Tech City in London, with the online retailer moving its headquarters to the area.
Google has shown its commitment to East London's Tech City by signing a long-term lease for a seven story building where it plans to provide a launchpad for London-based start-ups.
Silicon Roundabout or Tech City or Old Street as it used to be called has been given a cash injection by the government, offering 10 tech companies £100,000 each if they impress with their pitches.
Brit Week7Digital CEO Ben Drury has told TechRadar that London's Silicon Roundabout is beginning to have a real impact, although he's not convinced by the high-tech area's nickname.