10.—(1) Where a person is on any premises as defined in subsection (2) as a trespasser, he shall be guilty of an offence if he has with him—

( a ) any knife to which section 9 (1) applies, or

( b ) any weapon of offence (as defined in subsection (2)).

(2) In this section—

"premises" means any building, any part of a building and any land ancillary to a building;

"weapon of offence" means any article made or adapted for use for causing injury to or incapacitating a person, or intended by the person having it with him for such use.

(3) A person guilty of an offence under this section shall be liable—

( a ) on summary conviction, to a fine not exceeding £1,000 or to imprisonment for a term not exceeding twelve months or to both, or

( b ) on conviction on indictment, to a fine or to imprisonment for a term not exceeding five years or to both.