BBM According to this yes they do! (From this afternoon)
The crown must prove that Matthews:
Unlawfully
Killed
Becky
Intending to kill, or intending to cause her grievous bodily harm
Whether Shauna Hoare is guilty of murder or manslaughter or none. The crown must prove that:
That Hoare participated in the kidnapping of Becky Watts intending that she should be killed or come to serious bodily harm to overcome her resistance.
In the course of the attack Matthews suffocated or strangled Becky while intending to kill her or cause her really serious bodily harm.
OR if Hoare participated in the kidnap of Becky, and reasonably believed that some harm might be caused to her this is manslaughter.
that's interesting, thank you! possibly not constructive manslaughter then. The intention to kill or cause GBH is what's required for a murder charge.