Protected British oak as a building reserve

Are British oaks protected as a reserve in case the Royal Palaces need large timbers?

Yes, protective arrangements remain for that kind of requirement.

Protective arrangements reportedly remain for British oak that could be required as building timber by the Royal Palaces. This continues the older state practice of reserving exceptional trees for important construction. The discussion does not define the legal mechanism or identify particular trees, so the claim applies narrowly rather than to all British oak.