Common assault is an offence in English law. It is committed by a person who causes another person to apprehend the immediate use of unlawful violence by the defendant. In England and Wales, the penalty and mode of trial for this offence is provided by section 39 of the Criminal Justice Act 1988. Statute Section 39 of the Criminal Justice Act 1988 provides: On 13 September 2018, the Assaults on Emergency Workers (Offences) Act 2018 received Royal Assent. This added a subsection which states any common assault or battery on an emergency worker (as defined in the Act) is triable either way and subject to a maximum of 12 months' imprisonment if tried on indictment. Ingredients of the offence Section 39 of the Criminal Justice Act 1988 does not contain a definition of the expression "common assault" that appears there. What the offence actually consists of must be determined by reference to case law. A person commits an assault if he performs an act (which does not for this purpose include a mere omission to act) by which he intentionally or recklessly causes another person to apprehend immediate unlawful violence. Actus reus Both in the common law and under statute, the actus reus of a common assault is committed when one person causes another to apprehend or fear that force is about to be used to cause some degree of personal contact and possible injury. There must be some quality of reasonableness to the apprehension on the part of the victim. If the physical contact is everyday social behaviour such as a handshake or friendly pat on the back, this is acceptable even though the victim may have a phobia although, if the defendant is aware of the psychological difficulty, this may be converted into an assault if the intention is to exploit the condition and embarrass the victim. More generally, if the defendant threatens injury tomorrow, the victim has the opportunity to take avoiding action. Thus, what is threatened must be capable of being carried out immediately. This would exclude a conditional threat. For example, if the defendant says that he would beat the living daylights out of you but for the presence of a police officer watching them both, the victim is supposed to understand that there is no immediate danger (cf. Tuberville v Savage'''s "If it were not assize time I would not take such language from