8.—(1) In respect of inquiries that appear to the Secretary of State likely to last for 4 days or more, the inspector shall prepare a timetable for the proceedings.
(2) In respect of shorter inquiries, the inspector may at any time prepare a timetable for the proceedings at, or at part of, an inquiry.
(3) The inspector may, at any time, vary the timetable prepared under the preceding paragraphs.
(4) The inspector may specify in a timetable prepared pursuant to this rule a date by which any proof of evidence and summary sent in accordance with rule 15(1) shall be sent to him.