From a mobile app to help improve the dieting process to a citizen journalism project an eclectic range of startups presented at the Activate Tech Talent day

Tim Weber looks back at the Guardian Activate Summit 2012 in London, building on the theme of agility and the challenge of organisations having to pivot and adapt to stay ahead of change

Introducing the Activate London agenda for 2012 with headline themes of open vs closed, the challenge of agility, big data and entrepreneurship