25In section 46 of that Act (which provides that certain matters are not to be passed into public sewers), in subsection (2) (under which a contravention of that section is punishable on summary conviction by a fine not exceeding £20 and a further fine not exceeding £10 for each day on which the offence continues after conviction)—
(a)for the words "" £20 " and " £10 " there shall be substituted the words " £400 " and " £50 " respectively ; and
(b)there shall be added at the end the words " and on conviction on indictment, to a fine or to imprisonment for a term not exceeding two years or to both a fine and such imprisonment ".