Buckfast monks should be stripped of their charitable status, campaigners have said, following claims that they are profiting from selling "dangerous" wine.
The Charity Commission is launching a probe into the Buckfast Abbey Trust, where monks produce wine which has been associated with a surge in alcohol-related violence.
The National Secular Society - which works to challenge religious privilege - has claimed Buckfast Tonic Wine, known as "Buckie" in Scotland where it is most popular, is a scourge on society.
The drink has been linked to 6,500 reports of antisocial behaviour and violence in just two years. Yet Buckfast Abbey Trust, which produces Buckfast Tonic Wine, does not pay tax on its income because it is a charity, something which the National Secular Society claims is an "abuse of the charitable system".
Now the National Secular Society is calling for the monks who make the controversial beverage to be stripped of their charitable status.
The drink has been made by monks at Buckfast Abbey in Devon since the 1920s.
Last year the abbey said it supported alcohol education charities like Drinkaware, a fact which the the charity disputes is true.
At the time the Buckfast Abbey Trust said: "The majority of people who drink the tonic wine do so responsibly. We fully support the efforts of charities such as Drinkaware who work to reduce alcohol misuse and harm in the UK."
The Charity Commission revealed Buckfast Abbey Trust's income for 2014/15 was £8.8m - mostly from its wine.
And since 2004 the Trust has made around £88m in royalties from each bottle. The Trust does not pay tax on the income because it is a charity - which the National Secular Society says is an "abuse of the charitable system".
It has now called on the Charity Commission to remove the charitable status. Society vice president Alistair McBay said: "The monks should be setting an example as a religious organisation but the opposite is happening. "The question needs to be asked 'Are they serving God or Mamon?"
The Trust justifies its charitable status by saying its aim is the "advancement of the Roman Catholic religion". The Charity Commission said it takes "all complaints about registered charities seriously" and would "assess the information about the Buckfast Abbey Trust to determine if there is a regulatory role for the Commission".
Buckfast Abbey Trust said that following the complaint it would contact the Charity Commission. Police in Scotland and the Scottish Labour Party have tried to ban the wine. Dundee Sheriff Alastair Brown said recently that the drink is "something which is often seen as a feature of cases involving violence."