defra wiki was set-up by the 'Department for Environment, Food and Rural Affairs' (defra) – a ministerial government department of the United Kingdom of Great Britain and Northern Ireland. It was aimed at stakeholders developing the idea of an Environmental Contract.
It was experiment in collaborative, community-based public policy, but was halted soon after it started because of large amounts of vandalism. See Sky News article: Web Policy Goes Wrong.[permanently dead link]
- "A Government minister's attempt to get web users to help form policy has backfired .... Administrators were forced to withdraw the page after it was defaced by more than 170 people over a frenzied few hours."
The wiki was set up with the JotSpot wiki engine, and was originally open editing, but was subsequently changed to a registration process requiring e-mail confirmation. defra wiki is now dead, presumably after JotSpot was acquired by Google. The Internet Archive WaybackMachine at Archive.org created 56 captures of the wiki home page from 09 September 2006,  the last being 05 December 2008.  Little or no other content of the wiki has been archived.