In English criminal law, an inchoate offence is an offence relating to a criminal act which has not, or not yet, been committed. The main inchoate offences are attempting to commit; encouraging or assisting (formerly inciting) crime; and conspiring to commit. Attempts, governed by the Criminal Attempts Act 1981, are defined as situations where an individual who intends to commit an offence does an act which is "more than merely preparatory" in the offence's commission. Traditionally this definition has caused problems, with no firm rule on what constitutes a "more than merely preparatory" act, but broad judicial statements give some guidance. Incitement, on the other hand, is an offence under the common law, and covers situations where an individual encourages another person to engage in activities which will result in a criminal act taking place, and intends for this act to occur. As a criminal activity, incitement had a particularly broad remit, covering "a suggestion, proposal, request, exhortation, gesture, argument, persuasion, inducement, goading or the arousal of cupidity".[1] Incitement was abolished by the Serious Crime Act 2007, but continues in other offences and as the basis of the new offence of "encouraging or assisting" the commission of a crime.
Conspiracy is both a statutory and common law offence. In its statutory form, under the Criminal Law Act 1977, it consists of any agreement between two or more people to commit a criminal offence. Common law conspiracy, on the other hand, covers "conspiracy to defraud" and "conspiracy to corrupt public morals", although the latter has no substantive case law and is not seen as an offence that individuals are likely to be prosecuted for. All three inchoate offences require a mens rea of intent, and upon conviction, the defendant is sentenced as if they had succeeded in committing the attempted, incited or conspired crime in question.