The Agricultural Marketing (Public Inquiry) Rules 1949

9.  If it appears to the appointed person that two or more objections are so similar in substance that it is unnecessary to consider them separately, he may select any one of the objectors making those objections, who appears before him, to present the case on behalf of all of them and to call evidence in support thereof:

Provided that, notwithstanding any such selection, any objector may, by leave of the appointed person, be heard subsequently upon the objection made by him and call evidence in support thereof.