Organisers behind a controversial meeting in Southall have dubbed Ealing Council 'unreasonable' after it pulled the plug on the event at the last minute.
The Dominion Centre was due to host a conference on Sunday called Not So Great Britian, featuring key speakers linked to a dissolved Islamic group called Al-Muhajiroun.
Subjects on the agenda were to include a discussion about a 'moral breakdown' in the UK and the 'divine' solution offered by a turn to Islamic law.
But Ealing officials feared the event would cause a backlash and stepped in to cancel it at the 11th hour.
Councillor Jason Stacey, leader of Ealing Council, said: "It came to our attention that some of the speakers at the event had previously been reported as having views that could cause community tensions.
"We are not prepared to allow council premises to be used for events that could undermine community cohesion, and we therefore cancelled the booking."
The event was relocated and took place at a room above a restaurant in Southall Broadway.
Speakers included Abu Uzair, lecturer at the London School of Shari'ah and Anjem Choudary, judge of the Shari'ah Court of the UK and former UK head of Al-Muhajiroun.
A statement on the organisers' web-site, islam4.uk.com, reads: "This unique conference has been organised to demonstrate the various problems currently facing the UK whether that be rape, paedophilia, pornography, homosexuality, alcoholism, murders etc. and as well highlight the downfall of man-made law which is currently dictating all of the policies in the UK."
Mr Choudary said: "The event was organised as an invitation to Islam.
"We believe that the Shari'ah is a perfect law from God and Britain would be much better off if it was practised widely across the UK.
"The problem is that the newspapers probably put pressure on Ealing Council and they got a few telephone calls from The Sun.
"And they've got the police saying things like 'these guys are potential terrorists'.
"Ealing Council are getting it from all sides and they're a publicly-funded body. They don't want to do something that could affect that so they cancelled the meeting, but the fact that they did it on Saturday night was unreasonable.
"We were very transparent from the outset about what would be discussed at the meeting so why should they wait until Saturday night to cancel it?"
Mr Choudary said the relocated meeting ended up drawing about 200 attendees, including representatives from the national press.