Planning who should care for your children if you die is one of the hardest parts of making a will. Many parents feel a sense of relief once they have named a legal guardian in a will, then file the document away and try not to think about it again. But guardianship choices are more fragile than they appear, and small planning mistakes can lead to your wishes being ignored or challenged.

In this article, we look at the common estate planning mistakes that can put your chosen guardian at risk. We will explain how the law in England and Wales treats guardianship, where things often go wrong, and what you can do to give your chosen guardian and your children the strongest possible protection. At Sovereign Planning, we focus on clear, family-focused estate planning, so parents can feel more confident that their wishes are understood and respected.

Protecting Your Child’s Future Starts Before You Die

Many parents assume that writing a name in a will is the end of the job. The truth is that guardianship decisions can be challenged, questioned or simply made unworkable if the rest of your planning does not match.

Guardianship is especially vulnerable to:

• Family disagreements about who is “best” for the children  
• Court oversight where there are disputes or unclear wishes  
• Practical problems, such as money, housing or schooling, that your will does not address  

Our aim is to help you see how different parts of your estate plan fit together. When your will, guardianship choices, trusts and other documents all support each other, it is easier for your wishes to be understood and followed.

Assuming Guardianship Is Automatic and Guaranteed

In England and Wales, you can appoint a guardian for your children in your will. This is a strong indication of what you want, but it does not remove the power of the family court. If there is a dispute, the court must look at what is in the best interests of the child, not just what the will says.

Common false assumptions include:

• Thinking godparents are automatically legal guardians  
• Relying on verbal promises or family “understandings”  
• Assuming your partner will always get guardianship without anything in writing  

If your guardianship wishes are not properly recorded, there is a risk of:

• Delays in who can make decisions for your children  
• Children being placed in temporary foster care while adults argue  
• The court choosing someone you would never have picked  

Many families like to review their finances in the spring, before the summer holidays or around the end of the tax year. That can be a natural time to check that your guardianship wishes are clearly written into a valid will and any supporting documents.

Choosing Guardians Without Realistic Long-Term Planning

It is very easy to choose guardians with your heart only. You may feel closest to a certain friend or relative, but that does not always mean they are the best long-term choice.

Important questions to think about include:

• Age and health,  will they still be able to cope in ten or fifteen years?  
• Location,  would your children need to move schools or even areas?  
• Their own children,  how would your children fit into that family?  
• Values and lifestyle,  do they share your views on discipline, education and religion?  

If these things are not thought through, you might face problems such as:

• A guardian later refusing the role because it is too much  
• Strain on the guardian’s own family that spills over into conflict  
• The court questioning your choice if it seems unrealistic or unstable  

Best practice is to:

• Talk openly to the people you are thinking of naming  
• Check they are willing and understand what the role means  
• Review your choice at key times like a new baby, separation, house move, serious illness or a change of school  

That way, your will reflects your children’s real lives, not an out-of-date idea of what your family looks like.

Leaving Guardians Without Financial Support or Clear Instructions

Naming a guardian is only half of the picture. If the money side of your estate does not match your guardianship plan, the person you choose may struggle to give your children the life you would have wanted.

Common mistakes include:

• No life insurance or savings earmarked for children  
• Leaving large lump sums directly to minors instead of to a trust  
• Assuming a guardian can access funds easily when the law may limit this  

A well-planned estate often separates who cares for the children (the guardian) from who manages the money (the trustees). This can actually protect your wishes, because:

• Trustees can focus on long-term financial decisions  
• Guardians can focus on day-to-day care and emotional support  
• There is a clear structure if disagreements arise about spending  

A detailed letter of wishes that sits alongside your will can help even more. This is not a legal document, but it is strong guidance. You can cover things like:

• Schooling preferences and educational goals  
• Religious upbringing and cultural traditions  
• Contact with wider family members  
• How you would like money used for holidays, hobbies and special times like birthdays  

This kind of guidance can be especially helpful around long school breaks, when costs and practical decisions tend to increase.

Outdated Wills, New Relationships and Blended Families

Life moves on, but many wills do not. New relationships, separation, remarriage and blended families can all unsettle your original guardianship choices if your documents are not updated.

Risks include:

• An ex partner still named where the relationship has broken down  
• Different guardians for different children without clear reasoning  
• Tension between biological relatives and step-relations fighting over care  

Outdated documents often create room for challenge. Relatives can argue that your will does not reflect your current life or that your old choice of guardian is no longer suitable, which may push the court to step in.

A practical habit is to review your will:

• Every three to five years  
• After big life events like marriage, divorce or a new baby  
• When you move home or your children change schools  
• During regular planning seasons, for example near the new tax year  

Regular reviews help keep your guardianship choices aligned with the family your children actually live in.

Ignoring LPAs and Everyday Decision-Making for Children

A will only takes effect after you die. Lasting Powers of Attorney (LPAs) are about what happens if you are alive but cannot make decisions, for example because of serious illness or accident.

Without LPAs, there can be confusion or arguments about:

• Who makes medical decisions  
• Who deals with money for your children’s needs  
• How schooling and day-to-day care are handled  

When your will, guardianship appointments, LPAs and any trusts are planned together, it gives clearer guidance to family members and professionals. Everyone can see who you trusted to care for your children and who you wanted to manage their money, both during your lifetime and afterwards.

Many parents feel more at ease sorting these documents before busy periods like summer travel, when they are more aware that something unexpected could happen while they are away.

Secure Your Guardian Choice with a Professional Review

Naming a legal guardian in a will is an important step, but it is not the whole story. The strength of that choice depends on how well the rest of your estate planning supports it. Thoughtful guardianship appointments, up-to-date wills, suitable trusts, clear letters of wishes and carefully planned LPAs can all work together to protect your children and the people you trust most.

At Sovereign Planning, we work with families across the UK, often in their own homes, to create clear and practical estate plans that put children’s needs first. Regular reviews around key life events or natural planning points such as the new school year or financial check-ins can help keep your plans in line with your real-life. That way, if the worst happens, your children are more likely to be cared for by the person you chose, in the way you would have wanted.

Protect Your Children’s Future With The Right Guardianship Choice

If you are unsure how to choose a legal guardian for a will, we can guide you through every step so your wishes for your children are clearly set out and legally sound. At Sovereign Planning, we take time to understand your family circumstances and help you document practical, realistic arrangements. Speak with our team today to get your questions answered and put robust plans in place, or simply contact us to arrange a no-obligation discussion.