'Assume for the moment that the tribunal has the power to review the commissioners' discretion. It could only properly do so if it were shown the commissioners had acted in a way which no reasonable panel of commissioners could have acted; if they had taken into account some irrelevant matter or had disregarded something to which they should have given weight. If it had been intended to give a supervisory jurisdiction of that nature to the tribunal one would have expected clear words to that effect in the 1972 Act [theFinance Act 1972 ]. But there are no such words to be found. Section 40(1) sets out nine specific headings under which an appeal may be brought and seems by inference to negative the existence of any general supervisory jurisdiction.' (Section 83 is the successor to thes 40(1) of the 1972 Act referred to. There are now more specific headings but no general supervisory jurisdiction has been conferred.) [50] The tribunal in Marks and Spencer plc v Customs and Excise Comrs [1998] V&DR 93 (Mr Stephen Oliver QC) was of the same view. It said (at para 18): '
'However in so far as the complaint is not focused upon the consequences of the statute but rather upon the conduct of the commissioners then it is clear the tribunal had no jurisdiction. Its jurisdiction is limited to decisions of the commissioners and it has no jurisdiction in relation to supervision of their conduct.'