Not Super Gran from UK, but the American TV reality show Supernanny whom Rev. Lin once commended on the pulpit.
Wretched podcast (7/25/2014) has a good take on this:
Secular view. In one instance, supernanny asked the child to "Respect your step father because he's always been there for you..." Wrong, what if he's not there some time?
If you dishonor him[your step father], you dishonor God. The Nanny is only an external temporal witness, when she's gone, we need an eternal witness. So only a Christian worldview can fix this rightly.