LawByLak — Topic 15: Insanity and Automatism (OCR H418, Paper 1)
Topic 15 · Insanity and automatism
One line
One question decides everything: was the cause internal or external?
Short blurb, for a listing card
Two defences, one dividing line, and a set of facts that can land on either side of it depending on a single detail. This guide teaches the fork before the doctrine, because a defendant who took their insulin and a defendant who did not are on opposite sides of the same rule.
Full description
Insanity and automatism are usually taught as two topics. They are better learnt as one question. Both ask whether the defendant's mind was engaged with what their body did; what separates them is whether the cause came from inside or outside. Get the fork right and the doctrine follows. Get it wrong and every paragraph after it is wrong too.
That is why this guide leads with the divide rather than the M'Naghten rules, and why the diabetes cases get a decision fork of their own. The same condition, the same defendant, and two different verdicts turning on whether the insulin was taken. Nothing else on this specification illustrates a legal test so cleanly.
From there: the three limbs of M'Naghten and what each actually requires, the internal and external cause authorities, the point at which automatism becomes self-induced and stops helping, and the special verdict, which is the outcome students are most surprised by.
This is an application topic. It has never been set as an essay, and it is not in the specification's evaluation strand. So the guide spends its length where the marks are: on splitting a scenario into its separate incidents and running the same test against each one.
What's inside
- 19 authorities, grouped by the element they prove
- The internal and external fork, worked on the diabetes cases
- The three M'Naghten limbs, with the either/or structure of limb three set out properly
- Worked analysis steps, an authority priority table, and an interactive confidence scale
- Full model answers, a last-minute page and a glossary