Sibling relationships are one of the longest-lasting and emotionally significant bonds in a person’s life. For children entering the care system, a brother or sister represents more than just a shared history – they provide a vital sense of identity and belonging at a time of upheaval. Yet, a significant “siblingship gap” remains in kinship care. This disparity often results in siblings being separated, sometimes by distance, with an estimated 37% of children in care living apart from at least one sibling.
The need for evidence for kinship care
With over 141,000 children estimated to live in kinship care across England and Wales, the pressure to find stable, family-based placements is mounting. However, the siblingship gap often stems from systemic barriers rather than a lack of willing carers. These include:
- Biological uncertainty: Often due to the absence of a father’s name on a birth certificate.
- Conflicting testimonials: Ambiguous or disputed family histories.
- Administrative delays: Legal timelines often move fast and require evidence with quick turnarounds.
Without proof of a biological relationship, there may be hesitation to place children together, especially if there is a dispute regarding paternity.
When family ties must be proven
While the “think family” approach encourages keeping siblings together, the legal threshold for kinship care – particularly for Special Guardianship Orders (SGOs) and Child Arrangement Orders (CAOs) – demands more than just anecdotal evidence. This is where the overlap between social work and science occurs:
DNA testing can quickly confirm if potential kinship carers, such as older siblings, aunts, uncles or grandparents are biologically related to the child(ren), providing the “green light” for a Viability Assessment.
When a carer steps forward for a second sibling, the lack of “official” documentation (such as a birth certificate naming the father) becomes a hurdle. Without clear evidence like a legal DNA test, many carers simply cannot prove the relationship to the standard required for a Viability Assessment. In these instances, they may not even be recognised as a “connected person” under the Children Act 1989, effectively closing the door on placement.
The role of legally admissible DNA testing
For DNA test results to be used in a court environment, the process must be legally admissible. This requires a strict chain of custody to ensure that the results are robust and it must be conducted by an accredited laboratory – one that is Ministry of Justice approved and UKAS accredited to ISO 17025 standards.
By utilising DNA testing during the early stages of the assessment process, legal professionals and local authorities can bridge the gap in the evidence and ensure that the biological right to a shared childhood is protected.
In kinship care, relationships are often complex because the biological parents may be unavailable for testing. NorthGene™ specialises in these complex analyses, including:
- Siblingship: Determining if children are full or half siblings. While parentage tests are 99.99% conclusive, siblings share roughly 50% of their DNA (and 25% for half siblings), requiring a more sophisticated level of analysis and expertise.
- Avuncular: Verifying biological connections between aunts/uncles and nieces/nephews.
- Grandparentage: Confirming the biological link between grandparents and grandchildren.
Partnering with NorthGene™
NorthGene™ is a Ministry of Justice-approved, UKAS-accredited laboratory dedicated to providing clarity in these cases. Our results are legally admissible, providing the evidence needed to support kinship care applications and secure a child’s future.
Our team of experts conduct every test to the highest level of rigour, ensuring a strict chain of custody, meticulous quality control and independent, third-party verification. With results typically issued within 1–2 working days of sample receipt, we provide the fast answers families and professionals need when time is of the essence.
By leveraging legal DNA testing with NorthGene™, legal professionals can ensure that families are kept together, supporting outcomes that not only prioritise stability and child welfare, but a sense of identity, belonging and the maintenance of deep family bonds.
To learn more about legal DNA testing with us, click here or contact our team today.




