5(1)Where, immediately before the relevant day, an investigation under section 3 of the [1980 c. 21.] Competition Act 1980 has commenced and is being proceeded with, that Act shall, so far as concerns—
(a)further proceeding with the investigation,
(b)publishing, after completion of the investigation, such a report as is mentioned in subsection (10) of that section, and
(c)taking action in consequence of the report,
have effect as if this Act had not been passed.
(2)For the purposes of this paragraph, an investigation under section 3 of the Competition Act 1980 shall be taken to have commenced once the authority by whom it is to be carried out has performed the duties which subsection (2) of that section requires him to perform before carrying out the investigation.