An enforcement notice is the only type of notice that could be used.....but they can only be served on the responsible person or any person who has to some extent control of a workplace.
If an employee has no real control over a workplace and he recklessly discharges fire-fighting equipment no notice could be served on him.
A notice could be served on the responsible person or a person with some control requiring the equipment to be replaced.
But if, as a result of the malicious discharge fire-fighting equipment is not available, and the lack of it placed persons at serious risk...an offence has been committed and that employee could be charged with the offence by virtue of Article 32(10)
........ Where the commission by any person of an offence under this Order, is due to the act or default of some other person, that other person is guilty of the offence, and a person may be charged with and convicted of the offence by virtue of this paragraph whether or not proceedings are taken against the first-mentioned person.