‘(7) If a person who apart from this sub-section would be liable to a surcharge under sub-section (4) above satisfies the Commissioners or, on appeal, a Tribunal that in the case of a default which is material to the surcharge – (a) the return or as the case may be, the VAT shown on the return was despatched at such a time and in such a manner that it was reasonable to expect that it would be received by the commissioners within the appropriate time limit, or (b) there is a reasonable excuse for the return or VAT not having been so despatched then he shall not be liable to the surcharge and for the purposes of the preceding provisions of this section he shall be treated as not having been in default in respect of the prescribed accounting period in question (and, accordingly, any surcharge liability notice the service of which depended on that default shall be deemed not to have been served)’
‘(1) For the purposes of any provision of section 59 which refers to a reasonable excuse for any conduct - (a) any insufficiency of funds to pay any VAT due is not a reasonable excuse.’
“… [I]f the exercise of reasonable foresight and of due diligence and a proper regard for the fact that the tax would become due on a particular date would not have avoided the insufficiency of funds which led to the default, then the taxpayer may well have a reasonable excuse for non-payment, but that excuse will be exhausted by the date on which such foresight, diligence and regard would have overcome the insufficiency of funds.”