'but-for' test. - But for the defendant's actions the conesequence(s) would never have occurred.
(R v Pagett 1983) (R v White 1910)
Legal Causation
Proof that the D is the MORE THAN MINIMAL CAUSE (de minimis rule).
D is the biggest factor.
D can still be guilty even if their conduct isn't the only consequence.
(R v Kimsey)
Legal Causation: Thin Skull Rule
To take the victim as we find them.
If the victim has something unusual about their physical or mental state which makes an injury more serious then the D is liable for the more serious injury.