PART II—OFFENCES AGAINST THE PERSON
CHAPTER 1—JUSTIFIABLE FORCE AND HARM
Section 39—Use of Force for Defence of Property or Possession or Overcoming Obstruction of Legal Right.
A person may justify the use of force for the defence of property or possession, or for overcoming and obstruction to the exercise of any legal right, as follows—
(a) a person in actual possession of a house, land, or vessel, or goods, or his servant or any other person authorised by him, may use such force as is reasonably necessary for repelling a person who attempts forcibly and unlawfully to enter the house, land, or vessel, or to take possession of the goods ;
(b) a person in actual possession of a house, land, or vessel, or his servant or any other person authorised by him, may use such force as is reasonably necessary for removing a person who, being in or on the house, land, or vessel, and having been lawfully required to depart therefrom refuses to depart ;
(c) if a person wrongfully takes possession of or detains goods, any other person who, as against him, has a present right to the possession of them, may, upon his refusal to deliver up the goods on demand, use such force, by himself or by any other person, as is reasonably necessary for recovering possession of the goods ; and
(d) a person may use such force, as is reasonably necessary for overcoming any obstruction or resistance to the exercise by him of any legal right.
Self-defence - national proceedings
EDIT.