“ (7) If a person who, apart from this subsection, would be liable to a surcharge under subsection (4) above satisfies the Commissioners or, on appeal, a tribunal that, in the case of a default which is material to the surcharge— (a) … (b) there is a reasonable excuse for the return or VAT not having been so despatched, he shall not be liable to the surcharge …”
“a reasonable excuse should be judged by the standards of reasonableness which one would expect to be exhibited by a taxpayer who had a responsible attitude to his duties as a taxpayer, but who in other respects shared such attributes of the particular appellant as the tribunal considered relevant to the situation being considered”