Yes, parents can apply for a Dependent visa in the UK, provided they meet specific visa and eligibility requirements, depending on the immigration status of the child in the UK and the needs of the parents.  Alternatively, parents may also apply for an Adult Dependant Relative visa if their UK-based child requires long-term care and assistance on a daily basis. Parents can also apply as a parent of a Child student if the child is enrolled at an independent school in the UK.