The Muslim population of Britain topped 3.3 million by the end of 2013 to become around 5.2% of the overall population of 63 million, according to figures extrapolated from a recent study on the growth of the Muslim population in Europe.
At the same time, opinion surveys consistently show that voters in Britain view Islam and the question of Muslim immigration as a top-ranked public concern. The British public, it seems, is increasingly worried about the establishment of a parallel Muslim society there.
But government efforts to push back against the Islamization of Britain have been halting and half-hearted.
What follows is a chronological review of some of the main stories involving the rise of Islam in Britain during 2013.
In January, Muslim gangs were filmed loitering on streets in London and demanding that passersby conform to Islamic Sharia law. In a series of videos, the self-proclaimed vigilantes-who call themselves Muslim London Patrol-are seen abusing non-Muslim pedestrians and repeatedly shouting "this is a Muslim area."
One video records the men shouting: "Allah is the greatest! Islam is here, whether you like it or not. We are here! We are here! What we need is Islam! What we need is Sharia!"
The video continues: "We are the Muslim Patrol. We are in north London, we are in south London, in east London and west London. We command good and forbid evil. Islam is here in London. [Prime Minister] David Cameron, Mr. Police Officer, whether you like it or not, we will command good and forbid evil. You will never get us. You can go to hell! This is not a Christian country. To hell with Christianity. Isa [Jesus] was a messenger of Allah. Muslim Patrol will never die. Allah is great! Allah is great! We are coming!"
In a January 23 interview with the online newspaper International Business Times, Anjem Choudary, a radical preacher who has long called for Sharia law to be implemented in Britain and other European countries, defended the gang, saying: "This is a wake-up call for society to ask, 'where are we headed?' There is a clash between Islam and liberal democracy in hotspot areas of London."
Choudary has previously led a campaign, known as the Islamic Emirates Project, to turn twelve British cities-including what he calls "Londonistan"-into independent Islamic states. The so-called Islamic Emirates would function as autonomous enclaves, ruled by Sharia law and governed entirely outside British jurisprudence.
In February, Choudary was filmed urging his followers to quit their jobs and claim unemployment benefits so they have more time to plan holy war against non-Muslims.