The films, entitled Why London, Social London, Big London and Value London, are available on Youtube, and feature some of the venues, attractions and hotels that make London a suitable destination for large association meetings.
Becky Graveney, head of associations for Visit London, said: "We felt a short film would be an ideal platform to communicate with busy association teams. We wanted to highlight just how attractive London is for the sector, and how Visit London can support associations."
The films are part of a free guide for the association sector. Other communications include a dedicated web page, directory and bi-annual e-newsletter.