Microsoft's chief marketing officer in the UK, Philippa Snare, is leaving the company for Facebook after 16 years. Snare is about to go on gardening leave for several months before joining Facebook, where she will be director of business marketing for EMEA. She will lead all of Facebook's business-to-business marketing activity in the region, a Facebook spokeswoman said. Snare has overseen major campaigns for its Azure cloud computing platform and the Lumia range of smartphones.