The man (my brother in-law) applying is a British citizen already married with 5 children and they all are British.
He has all married someone in Pakistan around 5 years ago, basically his second wife

Scenario 1) He wants to bring the second wife in Pakistan over to the UK. Just need confirmation, I know polygamy is not legal in the Uk so am I right in saying this can never happen?
Scenario 2) planning so hard to have a child so if he does end up having a child in Pakistan, will that child be allowed to come the UK with his second wife?
Scenario 3) is there a way he can bring the second wife over at all, I’m predicting that they will try some fake story to get her in any other way. The thing is, I don’t want her to come. Hopefully, immigration will know he has a wife already, will he be able to sponsor her some other way (hopefully not
