There is no right of private defence against an act which does not reasonably cause the apprehension of death or of grievous hurt, if done, or attempted to be done, by a public servant acting in good faith under colour of his office, though that act may not be strictly justifiable by law.

There is no right of private defence in cases in which there is time to have recourse to protection of the public authorities.

Extent to which the right may be exercised ? The right of private defence in no case extends to the inflicting of more harm than it is necessary to inflict for the purpose of defence.