R v Beckford*
Force is necessary if D believes there is an imminent threat.
D may also use pre-emptive strikes against an imminent threat.
R v (Gladstone)
Williams
D may make an honest mistake a threat being imminent and still have a defence.
R v O’Grady
If D makes a drunken mistake about whether there is an imminent threat, he will not have a defence.
R v Bird
There is no obligation to retreat, but if D fails to retreat when they
could, this may suggest force was not necessary.
76(3) Criminal Justice and Immigration
Act 2008*
Whether force is reasonable must be judged on the circumstances
that D believed existed at the time.
S76(7)(a)*
D is not expected to weigh up exactly how much force is reasonable in the heat of the moment
S76(7)(b)*
If D ONLY does what they honestly and instinctively thought was
necessary, this is good evidence they have acted reasonable
R v Hussain/ R v Martin
Using excessive force or acting in revenge is NOT self- defence
S76(5A)
In householder cases, use of force is only unreasonable if it is grossly
disproportionate to the threat faced