The $18billion (£12bn) in assets of Britain's Islamic banks are said to dwarf those of Muslim states such as Pakistan, Bangladesh, Turkey and Egypt. And there are also 55 colleges and professional institutions offering education in Islamic finance in Britain - more than anywhere else in the world.
This development has been actively pushed by the government. When he was Chancellor of the Exchequer, Gordon Brown declared that he wanted London to become the global centre of Islamic banking. You can obviously see the attraction, especially in these straightened times. But the only thing our politicians and bankers appear to see is the seductive prospect of trillions of pound and dollar signs dancing before their bedazzled eyes.
What they refuse to acknowledge is the real price that is to be paid for this. They don't understand that the spread of sharia banking in Britain and America is a significant part of the attempt to Islamise Britain and America. Acceptance of sharia finance furthers the Islamist objective of gradually legitimising Islamic sharia law more generally in the west.
The point which is being missed is that all who use it must conform to the dictates of sharia law. Sharia financial institutions may not be making this clear now - they don't want to frighten people away - but at some point that IOU of sharia-compliance will be called in. This is how sharia-compliance will be spread to both the Muslim and non-Muslim population.
Any Western institution that endorses sharia-compliant products therefore effectively endorses the extremist ideology behind it of conquering the west for Islam, whether it knows it or not.
The most important point to grasp is that Islam recognises no authority superior to sharia. Sharia banks will therefore not recognise the superior authority of the law of the land. When trillions of pounds and dollars are locked into them, who will argue with them?
Even more troubling is the potential cover provided by sharia finance for the financing of terrorism. Sharia requires Muslims to tithe a percentage of their money to charity, called ‘zakat'.
But charity in Islam is more like solidarity. So some of this money donated to Islamic charities may well find its way to organisations promoting jihad and supporting suicide bombing including Hamas, Hezbollah, the families of Palestinian suicide bombers and Islamist madrassas in places like Pakistan.
Sharia finance: The UK now has five fully 'sharia-compliant' banks.
Only certain Islamic authorities are entitled to issue the religious rulings or fatwas that can recognize investments as sharia-compliant. But the people and institutions making the decisions about where this money is sent are themselves often highly questionable.
These include the Fiqh Academy in Jedda, Saudi Arabia, which is associated with the Saudi-dominated Organization of the Islamic Conference (OIC); the European Council for Fatwa Research, and the Fatwa Council of North America. All of these are associated with the radical Wahabi and Salafi schools of Islam adhered to by groups such as al Qaeda and Hamas.
Radical cleric Sheikh Yusuf Qaradawi, who says suicide bombings are a religious duty in Israel and Iraq, is recognized as an expert in sharia-compliant investments.
Members of the Accounting and Auditing Organisation for Islamic Financial Institutions include the central banks of designated terrorist states Iran and Sudan along with finance houses implicated in funding al Qaeda, according to former U.S. counter-terror official Richard Clarke's testimony to a commission investigating the terror attacks on the US.
And in any event, the very idea that sharia finance is necessary for Muslims living in the west is untrue. Indeed, Islamic countries have used and still use interest. The Ottoman Empire used it; and interest is permitted even in Saudi Arabia. In 1981 Sheikh Tantawi, the prominent Islamic legal authority at al Azhar university, Cairo, issued a fatwa justifying the charging of interest.
What has to be understood is that sharia finance is simply a modern jihadi strategy to help Islamise Britain's institutions and society. It was devised in the mid-20th century by the ideologues who promoted the radical Islamism that threatens us today.
They advocated sharia finance as element of a separate, self-sustained Islamic order with its own Islamic ideology, Islamic politics and Islamic economics that taken together would guarantee an Islamic way of life and ultimately the Islamic state as the first step toward establishing Muslim rule worldwide.
As Britain's government and banks congratulate themselves on the stunning growth of sharia banking in the UK, do any of them have the slightest understanding of what they are doing?