"10. Subject to the following rules, the chairman may at any time either on the application of a party or on his own initiative make an order in relation to any matter which appears to him to be appropriate…."
" 18 (4) If an order is made under paragraph (3), any reference to a chairman in relation to a pre-hearing review shall be read as a reference to a tribunal."
"18 (2) At a pre-hearing review the chairman may carry out a preliminary consideration of the proceedings and he may— … (b) issue any order in accordance with rule 10, or do anything else which may be done at a case management discussion;"
"27 (7) At a Hearing a tribunal may exercise any powers which may be exercised by a chairman under these rules."