The CPA campaigned against the building of the Abbey Mills Mosque in West Ham, planned to have been built by a sect of Islam which the CPA claimed was a "radical sect". The party's broadcast in relation to the planning was censored on both the BBC and on ITV, leading to the CPA taking unsuccessful legal action. A 23-year-old man from Stevenage posted a death threat on YouTube in response to the group's opposition to the mosque's construction. The party claimed the planned mosque was an "unwanted landmark", stating its belief that the construction would "undermine community cohesion". A petition on the official Downing Street website to prevent the mosque's construction gained more than 255,000 signatures, claiming that the mosque would "cause terrible violence".
