
Compiled from two articles at Ballot Access News:
On the evening of April 2, the leaders of seven political parties in Great Britain debated each other. All seven party leaders appear to have performed without making any obvious gaffes. See this story. Also, here is another story. For another, see this story. Each of these three articles is quite different from the others.
Although British press coverage of the 7-party debate on April 2 has been extensive, no U.S. news outlet seems to have covered the event. If anyone finds a link to a U.S. newspaper that does mention the debate, please comment. UPDATE: Gene Armistead sent me this link, by the Associated Press, but it appears to have been written minutes before the debate started, instead of afterwards. The story switches tenses throughout, between what happened and what is expected to happen.
UPDATE: here is a link to the 2-hour debate, from Green Party Watch.
Here is a BBC news story on the aftermath of the debate, with quotations from leaders of all seven parties on their reactions to the debate.

Perhaps British style debates could come to America?
I know Politico covered the debate, but mostly from a UK perspective:
http://www.politico.com/magazine/story/2015/04/british-elections-debate-116652.html?ml=m_b4_1
The amusing thing was the sub header “American style debate comes to Britain.” Not quite. If anything last time they had the debates in 2010 was more American. I believe only the major parties were invited to that one. (Though even then, they still had three.)