Is there a single tortious factor to consider? [[Yes->Is balance of probabilities standard specified?]] [[No->Is the injury divisible (in practice)?]]Is balance of probabilities standard specified? [[Yes->(Barnett)]] [[No->Is result dependent on action of third party?]]Is the injury divisible (in practice)? [[Yes->(Performance Cars, Dingle)]] [[No->Is there a single agent?]](//Barnett//)Is result dependent on action of third party? [[Yes->(Allied Maples)]] [[No->Was the breach of duty a failure to warn rather than a failure to diagnose?]](//Allied Maples//)Was the breach of duty a failure to warn rather than a failure to diagnose? [[Yes->(Chester)]] [[No->(Hotson, Gregg)]](//Chester//)(//Hotson, Gregg//)(//Performance Cars, Dingle//)Is there a single agent? [[Yes->Is there an evidentiary gap?]] [[No->(Wilsher)]]Is there an evidentiary gap? [[Yes->Are all factors sufficient in their own right?]] [[No->(Bonnington)]]Are all factors sufficient in their own right? [[No/Unknown->(Fairchild, Barker, Sienkiewicz), S3 Compensation Act 2006]] [[Yes->(Summers, Oliver)]](//Wilsher//)(//Bonnington//)(//Fairchild//, //Barker//, //Sienkiewicz//), S3 Compensation Act 2006(//Summers//, //Oliver//)