"We repeat that section 5 of the Act created a new offence. It provides a route to conviction whenever the jury are unable to say which of two (or sometimes more) defendants, caused or allowed the death of a child or vulnerable adult. Even if the identity of the person responsible for the fatal injuries cannot be established, the possible range of culpability, both in relation to the circumstances in which death occurred and as between the different defendants, is very wide. The victim may have been killed in circumstances which amount to murder. Culpability for the death may also encompass all the levels of manslaughter, both at the higher and towards the lower end of the scale. In the present case for example, it is difficult to imagine the state of mind which impelled the deliberate forced fracturing of the left femur on the leg which had only recently been subjected to a fracture of the tibia which was less than an intention to cause really serious bodily harm. [...] Wherever the case may fall in terms of the culpability of the perpetrator, a conviction of the section 5 offence means that it has been established that the defendant who failed to protect the victim either appreciated or ought to have appreciated that there was a significant risk that the victim would endure serious harm at the hands of the ultimate perpetrator, in circumstances which that defendant foresaw or ought to have foreseen. Although section 5 of the 2004 Act created a new offence, its link with manslaughter is clear, and the general approach to sentencing in manslaughter cases provides useful assistance to the court considering the sentencing decision after conviction of the section 5 offence."