Government departments are preparing for 2,000 journalists to descend on London's ExCel centre for the G20 summit in April.
Permanent secretary for government comms Matt Tee is expected to oversee the multi-department handling of the summit, which will bring together 20 heads of state.
Tee will remain in close co-operation with Brown's team and Cabinet Office head of international economic affairs and Europe, Jon Cunliffe.
Foreign and Commonwealth Office (FCO) head of strategic campaigns Conrad Bird said: 'It is a financial summit and because of that it is going to have a high degree of complexity. Trying to make it real for people is the aim.'
The FCO is managing global media outreach to 40 countries, handling the logistics and media accreditation, while setting up and taking part in events around the world. The FCO is using its new website londonsummit.gov.uk as a focal point.
FCO head of digital diplomacy Paul Bute said: 'The point is to create a hub for debate. It is hosted by the Government, but the idea is to showcase the diversity of debate.'
The site is using a number of partners including YouTube and Twitter. The FCO will continue to develop summit related stories after the event.