Indecent exposure you have to prove the intent for indecency - it was clear there was none.
Outraging Public Decency carries a maximum of 7 years - he got away lightly.
I can hear his defence now - "Drunk, did not see the memorial, sorry, ashamed and full or remorse".
He will live with that offence, that particular offence, for the rest of his life.
If he has any decency in his body, that will weigh heavy.
In the UK, any public exposure of genitals, sexual acts or touching oneself will be recognised as an offence. To establish that an offence has been committed, the audience affected by the exposure will be assessed to demonstrate whether the defendant's acts constitute indecency.
For example, if a person chooses to sunbathe with minimal clothes on at a beach that does not actively prohibit nudity, it is unlikely that indecent exposure will be established. However, a person who masturbates in a park or exposes their genitals on a high street, for example, will be considered to have acted indecently.