26.—(1) The TRA may, where it considers it appropriate for the purpose of making any determination or conducting any analysis under the Act or these Regulations, limit its examination to a sample of—
(a)categories of goods;
(b)UK producers;
(c)transactions for the purchase of the like goods and directly competitive goods in the United Kingdom; or
(d)anything else the TRA considers it appropriate to examine in order to make its determination.
(2) Where the TRA limits its examination in accordance with this regulation, it may use any reasonable method to determine the sample it considers appropriate.