-In deciding if the defence should succeed, the jury must consider a two-stage test:
-1. Was the defendant compelled to act as they did because they reasonably believed that they had a good cause to fear serious injury or death?
-The defendant must genuinely believe in the effectiveness of the threat, but also reasonably believe in it too. This test is of an objective nature.
-2.. If the first test is satisfied, would a sober person of reasonable firmness, sharing the same characteristics of the accused, have responded in the same way?
-The jury is allowed to take certain aspects of the defendant's characteristics into account, as the reasonable person is regarded as sharing the relevant characteristics of the defendant
-The characteristics that can be taken into account were decided in R v Bowen
-The relevant characteristics must go to the ability to resist pressure and threats.
The characteristics that could be accepted as relevant include:
Serious physical disability:
Recognised mental illness or psychiatric disorder:
-The test that says 'The relevant characteristics must go to the ability to resist pressure and threats' was laid down in the Court of Appeal in R v graham
-This test was then approved by the House of Lords in Howe (1987) and again in R v Hasan