Criminal damage as defined in Criminal Damage Act 1971 — common mistakes

In problem questions, always separate the actus reus and mens rea. For the AR, check each element: damage, tangible property, belonging to another. For the MR, state clearly that the test for recklessness is subjective post-R v G. If a lawful excuse under s.5 may apply, analyse it separately, highlighting the subjective nature of the defendant's belief versus the objective reasonableness of their actions where relevant. If life is endangered or fire is used, you must discuss the aggravated offences.

No. Under s.10(1) of the CDA 1971, 'property' is defined as tangible property. Computer data and files are intangible. While this action is unlawful, it would be prosecuted under the Computer Misuse Act 1990, not the Criminal Damage Act 1971.

Not necessarily. The offence requires a mens rea of either intention or recklessness. If you genuinely did not intend to cause damage and did not foresee any risk of causing damage (the subjective test from R v G), you lack the required mental element. A pure accident, where the risk was not foreseen, would not lead to liability for this offence.

Yes, you may have a lawful excuse under s.5(2)(a) of the CDA 1971. This provides a defence if you honestly believed that the owner had consented or would have consented. The key is your subjective belief. As established in Jaggard v Dickinson, this belief does not need to be reasonable, as long as it was genuinely held by you at the time.

The key difference is the mens rea regarding endangering life. For basic criminal damage, the defendant only needs to intend or be reckless as to damaging property. For aggravated criminal damage (s.1(2)), the defendant must also intend or be reckless as to endangering life by means of the damage. Consequently, the maximum sentence is much higher (life imprisonment vs 10 years).