'Other offences that might involve nudity
Exposure contrary to section 66 of the Sexual Offences Act 2003
Section 66 Sexual Offences Act 2003 requires a person to intentionally expose their genitals and intend that someone will see them and be caused alarm or distress. It is triable either way. Depending on the age of the defendant and the sentence that is imposed, an offender may be subject to the notification provisions (the sex offender register).
The need to prove that the person exposed their genitals intending that someone will see them and be caused alarm or distress means that a naturist whose intention is limited to going about his or her lawful business naked will not be guilty of this offence.
Outraging public decency
At common law it is an offence to do in public any act of a lewd, obscene or disgusting nature which outrages public decency. If conduct falls within the scope of a statutory offence, such as exposure contrary to section 66 of the Sexual Offences Act 2003 (see above) it is better practice to charge that offence unless, exceptionally, the offence merits a higher penalty than that available in relation to the statutory offence. Outraging public decency is triable either way and there is no maximum penalty.
The requirement for the behaviour to 'outrage' public decency was said by Lord Simon in Knuller (Publishing, Printing and promotions) Ltd v DPP to: "go considerably beyond the susceptibilities of, or even shocking, reasonable people".
The circumstances surrounding the conduct will need to be carefully considered. Section 66 SOA is available and normally to be preferred where it is done with the intention to cause alarm and distress.
Nudity in public alone with no aggravating features is very unlikely to amount to this (or any other) offence.'