
In the UK, marrying one's mother-in-law has traditionally been prohibited by a 450-year-old law. However, in 2005, a ruling by the European Court of Human Rights in Strasbourg challenged this long-standing ban. The case was brought forward by a couple from Warrington, where a man in his late 50s sought to marry his daughter-in-law, a woman more than 20 years his junior. The court's decision, which cited a breach of the Convention on Human Rights, forced the UK government to reconsider its legislation on marriage. This ruling sparked a debate between those who advocated for individual freedom and those who raised concerns about the potential impact on family dynamics and moral values.
| Characteristics | Values |
|---|---|
| Marrying your mother-in-law | Allowed only if your spouse had died or through a personal Act of Parliament |
| British law on marrying your mother-in-law | It is illegal |
| European Court of Human Rights ruling | British law violates Article 12 of the European Human Rights Convention, which gives men and women the right to marry |
| British government's justification for the law | Protecting "the integrity of the family", preventing sexual competition between parents and children, and shielding children from confusion, anxiety and harm |
| British government's response to the ruling | Must change the law to allow such marriages |
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What You'll Learn

The UK government's stance
The UK government, however, defended the existing law, arguing that it protected family values, morality, and prevented potential harm to children. The government's lawyer, Emily Willmott, stated that allowing marriages between parents-in-law would endanger children's morals and cause confusion, anxiety, and harm. She further argued that it could undermine the foundations of the family and alter relationships between relatives. The government's stance was supported by family values campaigners who highlighted the legal, sexual, and familial implications of such relationships.
Despite the government's objections, the European judges ruled in favour of the couple, stating that the British law did not provide an open right to marry. The judges acknowledged that while the law pursued the legitimate aim of protecting family integrity, it did not prevent such relationships from occurring. As a result of this ruling, the UK government was compelled to amend its marriage laws to allow marriages between parents-in-law and their sons/daughters-in-law, as long as there is no blood link between them.
While the UK government initially resisted changing the law, it ultimately had to yield to the decision of the European Court of Human Rights. This case highlights the tension between traditional family values and evolving social norms, as well as the role of the judiciary in interpreting and upholding human rights conventions. It is important to note that while the law may permit such marriages, societal attitudes towards these relationships may still be influenced by cultural taboos and perceptions of morality.
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The couple's argument
A couple from Warrington, UK, took their case to the European Court of Human Rights after being refused permission to marry by the Superintendent Registrar at Warrington Register Office. The couple, identified as B and L, argued that the marriage ban breached the Convention on Human Rights, which protects the right to marry and have a family, and outlaws discrimination.
B was previously married to C, with whom she had a son, W. After C left the marital home, B entered into a relationship with her father-in-law, L. They have lived together for nine years and are bringing up B's son, who calls his grandfather 'Dad'. L, the twice-divorced 58-year-old father-in-law, is now both the grandfather and stepfather to B's son.
The couple's legal argument was supported by Liberty, a human rights pressure group. Liberty's legal officer, Joanne Sawyer, stated that there was "no logical, practical, or rational justification" for preventing the couple from marrying. She highlighted that the couple was in a long-term relationship and strongly wished to marry.
On the other hand, the government's lawyer, Emily Willmott, argued that the existing law protected the family and morality. She claimed that allowing marriages between parents and their children's spouses could lead to sexual competition between parents and children and cause confusion, anxiety, and harm to children. Willmott further asserted that such marriages could undermine the foundations of the family and alter relationships between relatives.
The Strasbourg judges ruled that the British ban on marriages between parents and their children's spouses violated Article 12 of the European Human Rights Convention, which grants individuals the right to marry. As a result, the Lord Chancellor, Lord Falconer, was tasked with amending British law to permit such marriages.
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The court's ruling
In 2005, a British court ruling overturned a 450-year-old law that banned marriages between parents-in-law and their sons and daughters-in-law. The ruling was made by the European Court of Human Rights in Strasbourg, which found that the British ban on such marriages violated Article 12 of the European Convention on Human Rights, which protects the right to marry and have a family, and outlaws discrimination.
The case was brought by a couple from Warrington, identified as B and L, who had been refused the right to marry because the man, nearly 60 years old, was the father-in-law of the woman, more than 20 years his junior. B's marriage to C had ended in divorce, and a son, W, was born. B and L's relationship began after C, B's son, left the marital home. The judges were told that a marriage between B and L would mean the husband would be the grandfather of his own wife's son. The couple had lived together for nine years and were bringing up L's son, who called his grandfather 'Dad'. The judges said that the British law, which allowed such marriages only if the husband or wife had died or through a personal Act of Parliament, did not provide an open right to marry.
The ruling was hailed by the human rights group Liberty, which had taken the case to court, and which argued that there was "no logical, practical or rational justification" for preventing the couple from marrying. However, the government's lawyer argued that the existing law protected the family and morality, prevented sexual competition between parents and children, and shielded children from confusion, anxiety, and harm. Family values campaigners also condemned the judgment, saying that it would remove legal safeguards against such relationships that had been in place for hundreds of years for good legal, sexual, and familial reasons.
As a result of the ruling, the British government was forced to alter its marriage laws to allow marriages between parents-in-law and their sons and daughters-in-law, as long as they do not have a blood link.
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The family dynamic
Marriage is a sacred union that symbolizes the coming together of two individuals and their families. In the United Kingdom, the concept of marrying one's mother-in-law has been a subject of debate and legal scrutiny. While it may seem unconventional, there have been instances where individuals have contemplated or even pursued such marriages.
Historically, British law prohibited marriages between parents-in-law and their sons or daughters-in-law. This ancient law, dating back 450 years, was rooted in the belief that such marriages could harm children, endanger morals, and disrupt family dynamics. However, in 2005, a landmark ruling by the European Court of Human Rights challenged this long-standing prohibition.
The case involved a couple from the North-West of the UK, where a woman sought to marry her ex-husband's father. The European judges ruled that the British law prohibiting such marriages violated Article 12 of the European Human Rights Convention, which guarantees the right to marry. As a result, the British government was compelled to amend its marriage laws to accommodate these rulings.
While some family values campaigners criticized the ruling, arguing that it undermined legal safeguards and family integrity, others applauded the decision. Advocates for the ruling, such as the human rights group Liberty, asserted that there was no logical or rational justification for preventing consenting adults in long-term relationships from marrying, regardless of their familial ties.
In conclusion, the ability to marry one's mother-in-law in the UK has evolved due to legal challenges and shifting societal perspectives. While it may give rise to unconventional family dynamics, the law now recognizes the right of individuals to make such choices, provided there is no blood relation involved.
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The social implications
Marrying one's mother-in-law has long been considered taboo in the UK, with British law prohibiting such marriages for over 450 years. However, a 2005 ruling by the European Court of Human Rights in Strasbourg challenged this long-standing tradition, forcing the UK to alter its marriage laws. This ruling has sparked debates about the social implications of allowing individuals to marry their mothers-in-law.
One of the primary social concerns surrounding this issue is the potential impact on family dynamics and relationships. Some argue that allowing marriages between parents-in-law and their children's spouses could lead to confusion, anxiety, and harm within families. This concern is especially relevant when there are children involved, as in the case that led to the 2005 ruling. In that case, the marriage would have made the grandfather also the stepfather of his grandson, a situation that some argue could be deeply confusing and disturbing for the child.
The government's lawyer, Emily Willmott, asserted that the existing law protected family integrity and morality, prevented sexual competition between parents and children, and shielded children from potential harm. She further argued that allowing such marriages could undermine the foundations of the family unit and alter relationships between relatives. Family values campaigners shared similar sentiments, condemning the Strasbourg judgment for removing legal safeguards against such relationships.
On the other hand, supporters of the ruling argue that there is no logical, practical, or rational justification for preventing consenting adults in long-term relationships from marrying. The human rights pressure group Liberty, which brought the case to Strasbourg, hailed the decision as a victory for individual freedom and the right to marry. They contended that the previous British law unfairly discriminated against couples in such situations.
Overall, the social implications of allowing marriages between individuals and their mothers-in-law are complex and multifaceted. While some argue that the traditional ban protects family values and children's well-being, others defend the right of consenting adults to marry, regardless of their in-law relationship. The 2005 ruling highlights the evolving nature of social norms and the ongoing debate surrounding family structures and marriage laws in the UK.
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Frequently asked questions
In 2005, a UK court ruled that a man could marry his mother-in-law, as long as they do not have a blood link.
The couple in question took their case to the European Court of Human Rights, arguing that the ban on such marriages breached the Convention on Human Rights, which protects the right to marry and have a family, and outlaws discrimination.
The government's lawyer argued that the existing law protected the family and morality, prevented sexual competition between parents and children, and shielded children from confusion, anxiety, and harm.






































