I’m dealing with an application to the Chancery Court for an order authorising the mother of a minor, habitually resident in England, to convey German property, on the minor’s behalf, which the minor has inherited. Is there a jurisdictional basis under English law of guardianship enabling the court to make an order for the protection of a minor’s property? The issue of the jurisdiction of the English court (see (so Brussels IIa or Hague Convention) in relation to the property of a minor who is habitually resident in England is not in question. It is the English substantive law to be applied that is in question.
If I read your question correctly, the type of application you’re envisaging is discussed in re AC (a child)  EWFC 90 (available here: AC, Re (A Child) (Rev 1)  EWFC 90 (11 December 2020)). There’s conflicting dicta on whether the court can authorise a parent to contract to sell a child’s property as being within s 3 Children Act 1989. re AC is the latest word (that I’m aware of) and says that it can (para 21), that parties should not be dissuaded from seeking orders authorising a sale by dicta to the contrary in Hays v Hays  EWHC 3825 (Ch), and that in the ordinary course of events applications should be made to the Family Court (para 23).
Thank you FrancisNg. I wasn’t notified of your response which would have been very useful at the time. In my case, the Master analysed both cases and said that she preferred the reasoning in Re AC. So now, we have two decisions in favour of section 3. If you’re interested, the case is Re Shanavazi  EWHC 1832 (Ch).
Glad it ended well - good to know that re AC is being followed.