The Archbishop of Canterbury provoked a furore when he suggested Sharia - religious law based on Islamic principles - would inevitably become a part of life in Britain.
But there's at least one place Sharia has already proved an unqualified success - Birmingham's small business community.
Mohammed Nazir set up the Halal Fund - thought to be Britain's only business Sharia loan fund - about four years ago to provide funding for small businesses in the city.
It offers loans which are acceptable under Islamic law - which forbids charging interest. Instead the loans are based on the fund taking control of a percentage of the firm as collateral, which can be bought back at any time.
And Mr Nazir said there had been such a huge demand for the fund the only problem had been securing enough money to put into it.
He said even though a lot of the businesses that had approached him were not suitable, he had still had to turn down many because there was just not the capability in the Halal Fund's coffers.
"We have loads of enquiries coming in all the time, but we have to focus on the businesses we are working with at the moment," he said. "If we were to get extra funding there is a huge demand for what we do, everyone knows the demand is there."
At the moment the Fund is supported by Mr Nazir's own business and is linked to the Islamic Bank of Britain, based in Edgbaston.
It is having difficulty with expansion because turning to the most obvious source of business money - banks - would involve charging interest, which would ruin the Fund's Sharia credentials.
The Halal Fund was set up with the help of Muslim religious advisors, who interpret the religion's holy texts and rule on how it applies to modern finance. And in the years since it started, it has worked with dozens of businesses in Birmingham looking to get help from Muslim-friendly finance.
Mr Nazir said it was important to make sure the principles behind the fund were sound, adding that a similar scheme launched in East London failed because users decided its method of scheduling regular repayments was just another form of interest.
Many business owners have taken on funding from the Fund because a bank loan would clash with their religious principles. But although it was set up with Sharia law in mind, others have turned to it because of the practical benefits.
Naved Syed received funding from the Fund about three years ago for his business Rasoi Kitchen, a halal chicken firm based in Digbeth. He could have gone for a conventional loan, but decided on the Halal Fund for practical, rather than religious, reasons.
"It's quite a lot like the old-fashioned co-operative," he said. "I could have taken out a loan from a bank, but there's so much paperwork and red tape involved. They want to see a track record or things like six months' accounts, which might be a problem for some small businesses."
And he said the way Sharia loans worked meant the lender became a part of the company, which could be invaluable for a business just starting out.
He said: "The fund becomes a kind of partnership , which helps a lot. It gives you the added security of having a partner to help you with advice, as well as sharing the financial burden.
"If you prosper, they prosper, and if you fail, they fail. Where else can you get a loan where both partners are taking a risk like that?"
And Mr Nazir said the closer partnership created by a Sharia loan helped the Fund make sure its money was being used properly: "You need to make sure the business understands the investment and uses it properly. Usually the banks don't do that."