Public Sex

Performing a sex-act in public

Dogging (having sex in public) is not an offence although if causing distress of harassment or if it might be witnessed by a minor (such as in the street or near a school) then your local PC will be looking at the Public Order Act or possibly an indecent exposure under s.66 of the Sexual Offences Act 2003 or offence under  s.11 or s.12 or even  the common law offence of outraging the public decency.

The police policy is usually for arrest to generally be a last resort (depending on the circumstances).