nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqpls286swwdnkpks6ym4cakv78unvyvq26m3swxlw4m7lj3z2gu4q0wq8wj (nprofile…q8wj) nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqvcstpl8gsjxfxg35z0c0tkfw8l4yksresflvx88h60djj9aj55tsq0maql (nprofile…maql) It's actually worse than that. I've just been reading the UK #GDPR guidance regarding holding age data on children. It's bizarrely complex, but, essentially, children under 13 cannot legally give consent to their age data being held.
So yes, you can legally hold age data on adults, provided they consent; but you can't on children, unless their parent consents, and that can't just be 'someone who said they were the parent'.
https://ico.org.uk/for-organisations/uk-gdpr-guidance-and-resources/childrens-information/children-and-the-uk-gdpr/what-are-the-rules-about-an-iss-and-consent/