The BBC is facing a High Court challenge over its decision to censor a party political broadcast in the run-up to Thursday's local elections.
A Christian party has begun legal action after the corporation insisted on changes to a short film in which the party voiced opposition to the building of Europe's biggest mosque next to the site of the 2012 Olympics.
Tablighi Jamaat, the Islamic missionary group behind the £75 million Abbey Mills mosque, opposes inter-faith dialogue and preaches that non-Muslims are an evil and corrupting influence. One of its British advocates has said that it aims to rescue Muslims from the culture and civilisation of Jews and Christians by creating "such hatred for their ways as human beings have for urine and excreta".
The Christian Choice election broadcast would have described Tablighi Jamaat as "a separatist Islamic group" before welcoming that some "moderate Muslims" were opposed to the mosque complex.