LONDON: Britain’s National Health Service (NHS) has become embroiled in a heated political and cultural row after a government-backed education programme briefly published — and then quietly deleted — guidance describing the potential social and economic benefits of first-cousin marriage.
The document, posted on NHS England’s Genomics Education Programme website on September 22, noted that cousin marriages can lead to “stronger extended family support systems and economic advantages” while acknowledging higher risks of genetic disorders among children born to related parents.
Health Secretary Wes Streeting condemned the document as “shocking,” demanding an apology and calling such unions “high-risk and unsafe.”
However, MP Iqbal Mohamed, defending the cultural context, told Parliament that for many families — particularly in South Asian communities — such marriages are deeply rooted traditions that strengthen family and financial ties. He advocated genetic screening and education over prohibition.
Political divide and public opinion
Tory MP Richard Holden slammed the NHS for what he described as “appeasement of damaging cultural practices,” urging the government to ban cousin marriage outright. He linked the issue to immigration and women’s rights, saying the practice “should be ended for good.”
By September 29, the guidance had been removed from the NHS website following media backlash.
A YouGov survey released the same week showed that 77 per cent of Britons believe first-cousin marriage should be illegal, with just 9 per cent supporting its continued legality. Opposition was consistent across Labour, Tory, and Liberal Democrat voters.
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What the NHS guidance said
The NHS document clarified that cousin marriage remains legal under the Marriage Act 1949 and that the government has “no current plans to change this.”
It cited research showing that while the risk of genetic disorders in the general population is 2–3 per cent, it rises to 4–6 per cent for children of first cousins — meaning “most children of first cousins are healthy.”
The guidance further warned that stigmatising cousin marriage could deter families from seeking medical help, with experts instead recommending premarital genetic counselling and targeted education.
Bradford study and broader context
Research from Bradford, home to one of Britain’s largest Pakistani-origin communities, found that cousin marriages — though still “fairly common” — have declined from 40 per cent to 27 per cent over a decade.
The Born in Bradford study, which tracks over 13,000 children, reported that children of first-cousin parents were more likely to face developmental challenges and visit doctors more frequently, but most remain healthy.
Dr Sam Oddie of Bradford Teaching Hospitals noted severe genetic cases linked to endogamy but cautioned against oversimplification. “It’s wrong to blame cousin marriage alone,” he said. “Shared community genes — not just direct blood ties — are a major factor.”
Endogamous marriage patterns are also found among Jewish, Amish, and French-Canadian populations globally.
Cultural shift underway
Sociologists and health experts say changing education levels and greater social exposure are encouraging more “love marriages” and cross-community unions, marking a gradual cultural shift.
As public debate intensifies, the controversy underscores a deeper national conversation — one that lies at the intersection of public health, cultural identity, and social integration in modern Britain.