Question to the Home Office:

To ask the Secretary of State for the Home Department, if she will make it her policy that appropriate information about parents is included on children's passports and collected to reduce difficulties at border control for children whose surnames differ from their parents' surnames.

There are no plans to use the passport to identify parental relationships as
this would change the fundamental purpose of the document which is for
travel. Guidance on children travelling to the UK, including children
travelling with a parent who may have a different family name to the child, can
be found at:
https://www.gov.uk/government/publications/children-travelling-to-the-uk