In some cases (for example, when the child or a parent is not settled and thus free from immigration time restrictions) this can mean discretion on discretion on discretion.
Even a British sibling will not necessarily seal it.
https://www.gov.uk/government/uploads/s ... 150402.pdf9.17.12
An application which falls outside these criteria should not normally be approved, even if there are British citizen siblings or siblings with
entitlements to registration as a British citizen, unless we are satisfied that registration would be in the child's best interests
It's hard to see the logic behind a conviction that threats of a PAP or JR will turn discretion into entitlement.