Rhys practises in all areas of public law children work – for local authorities, parents, guardians and children. He has experience in cases involving non-accidental injury, sexual and ritual abuse, sexual exploitation and trafficking, as well as neglect and domestic abuse. He has had frequent experience of dealing with cases involving multiple intervenors. He has acted in cases involving foreign assessments and cross-cultural issues, as well as designation disputes between local authorities.

Rhys has recently successfully resisted an application for publication of the identity of a local authority and its social workers. In another case, he successfully reunited a mother with her baby in an NAI case following discovery that the mother had been trafficked.