governed by criminaljustice and immigration act 2008
if successful results in acquittal
d must prove/satisfy 2 elements
was the force necessary?
was the force reasonable in all circumstances?
prosecution must prove beyond reasonable doubt that d either wasn't acting in self defence or the force used was excessive
jury must decide if force was necessary
hussain
force wont be necessary if danger is over
beckford
pre emptive strikes included
cousins
d can use threats of force or death in order to try stop an attack on himself or prevent a crime
d is judged in the circumstances as they honestlybelieved them to be
ags ref no2
d can make preparations in self defence
bird
d is under no duty to retreat
whether force is reasonable covered by s76 criminal justice and immigration act 2008
martin
d not expected to weigh up exact amount of force but they must do what they honestly thought was objectively reasonable in the circumstances they subjectively believed them to be
heat of the moment
clegg
if force excessive then defence fails
gladstonewilliams
d judged on facts as they believed them
o'grady
cannot rely on mistakenbelief if that mistake was made due to d being voluntarily intoxicated
wider defence for householder cases under criminaljustice and immigration act 2008.
force is not reasonable where it is grosslydisproportionate
force must have been used while in/partly in a building that is a dwelling