Hi, How do I get my brother in law to move out of his sisters (my wife) house?

[Super Dave]

My mother in law recently passed away and the house my brother in law wont move out of has been left to my wife in the will, her estate is currently in the hands of the executors.
My wife and I have our own home, he has his own home but refuses to move out of his mums house, this is not down to a bond with his mothers house but due to the fact he has never had to stand on his own two feet and face reality, he's 41 years old, up to his eyeballs in debt, had more chances in the world than most folk but blows it every time on his lifestyle (Cars, flights to London, various women) in the past he's threatened to stab my pregnant wife in the neck, cut his mums head off and at least two women have had restraining orders taken out against him. (One woman ended up in a refuge)
My wife and I would like advice on the best way to get this man out of there mums house.
There is no mortgage on the property, his name is on electricity bill along with my wife's.
When he does work he works away 2 weeks at a time, off shore.
Thanks folks

 

[whole lotta history]

Call up the police and ask them. What they will tell you is that you have to give notice, 30 days or 6 months, have him sign a contract that he will have to be moved out by a certain date, then keep that contract somewhere safe. If he doesn't, then you need to call the police, if he doesn't own the house then it doesn't matter if his name is on the electricity bill.