Common law defence of
self defence/ defence of
another
Complete defence,
acquittal if successful
Statutory defence of
prevention of crime:
s.3 CLA 1967
Complete defence,
acquittal if successful
Defences to any
crime of which
the use of force
is an element.
Burden is on the
prosecution to
disprove it beyond
reasonable doubt
Was the use of force
necessary?
D is not under a duty
to retreat if faced with
threat from another
Possibilty of retreat is a factor
to determine whether the use
of force was necesary: s.76 (6a)
CJIA 2008: HUSSAIN AND
ANOTHER
D does not have to wait to
be attacked before he can
defend himself
He may make a pre-emptive
strike or make preparations to
defend himself if he
apprehends an attack:
ATTORNEY-GENERAL'S
REFERENCE (NO.2 OF 1983)
(1984)
If D genuinely made a
mistake about being
threatened or needing to act
to prevent crime, he is judged
on the facts as he believed
them to be
This is so even if the
mistake is
unreasonable: s.76 (3)
CJIA 2008: O'GRADY
Question of fact for
the jury to decide
Was the amount of force
used reasonable in the
circumstances?
Question of fact for
the jury to decide
In householder cases, the
degree of force used against
a burglar will not be
reasonable if it was grossly
disproportionate in the
circumstances: s.76 (5a) CJIA
2008
In all other cases, force will not be
reasonable if it was
disproportionate in the
circumstances: s.76 (6) CJIA 2008
D may not be able to
weigh to a nicety the exact
measure of any necessary
action: s.76 (7) (a) CJIA
2008
Where D only did what he
honestly and instinctively
thought was necessary is
strong evidence that only
reasonable action was
taken: s.76 (7 (b) CJIA 2008
If D genuinely made a
mistake about the degree
of force to use in
self-defence or prevention
of crime, he is to be judged
on the facts as he believed
them to be, even if they
were unreasonable: s.76 (3)
A mistaken belief caused by D's
voluntary intoxication is not
sufficient: s.76 (5) CJIA 2008
The amount of
force D uses must
not be excessive:
MARTIN
In deciding whether
the force used was
reasonable,
psychiatric
conditions must be
ignored: MARTIN