The case of lays out the elements of duress.
The case of states that D's partner qualifies as a person to whom threats can be made that D finds them self reasonably responsible for.
The case of states that some of D's characteristics can be considered when deciding if they acted as a reasonable person in the circumstances.
The case of states that where D has a reasonable opportunity to escape the threats or phone the police, the defence of duress is not available.
The case of states that the threat must still be effective at the time D commits the offence for duress to be available as a defence.