It sounds fair enough to me. I googled the definition and part of it says
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Actual Bodily Harm (ABH) under S.47
The offence of actual bodily harm is set out in S.47 Offences Against the Person Act 1861. Which provides that it is an offence to commit an assault occasioning actual bodily harm. Whilst the statute only refers to assault, the offence may also be committed by a battery. In fact it is far more common for offences under s.47 to be committed by battery rather than by an assault. Actual bodily harm is a triable-either-way offence. The maximum sentence for ABH is 5 years imprisonment.
Actus reus of ABH
Assault or battery
which causes
Actual bodily harm
Assault or battery
To constitute an offence under s.47 all the elements of an assault or battery must be present. However, some factors which may make an assault or battery lawful can not be applied to make an offence under s.47 lawful in particular:
Reasonable punishment of a child S.58 Children Act 2004
Consent
A-G ref no 6 of 1980 [1981] QB 715 Case summary
It used to be lawful for parents or others in loco parentis to use reasonable force in order to chastise children:
R v Hopley (1860) 2 F&F 202 Case summary
However, English law regarding lawful chastisement was held to be in breach of the European Convention of Human Rights:
A v UK (1999) 27 EHRR 611 Case summary
Lawful chastisement was abolished by s.58 of the Children Act 2004 and replaced with reasonable punishment of a child. This can not be used as a defence in relation to ABH, GBH or wounding but may be allowed in assault and battery only.
The assault or battery must cause actual bodily harm
This requires a consideration of both factual and legal causation.
Actual Bodily Harm
The meaning of actual bodily harm was considered in:
R v Miller [1954] 2 All ER 529 Case summary
Lynsky J:
"Actual bodily harm includes any hurt or injury calculated to interfere with the health or comfort of the victim"
R v Chan Fook [1994] 1 WLR 689 Case summary
LJ Hobhouse:
"The word "actual" indicates that the injury (although there is no need for it to be permanent) should not be so trivial as to be wholly insignificant."
Bodily harm
Bodily harm can include psychiatric injury see:
R v Chan Fook [1994] 1 WLR 689 Case summary
R v Ireland [1997] 3 WLR 534 Case summary
Bodily harm also includes the cutting off of hair://
So it includes the humiliation and haircutting.