“ (3) In a case where the person – (a) gave the notice required by section 7 of this Act within 6 months from the end of the year of assessment, but (b) was not given notice under section 8 or 8A of this Act until after the 31 st October next following that year, the difference [ie the tax] shall be payable or repayable at the end of the period of three months beginning with the day on which the notice under section 8 or 8A was given (4) In any other case, the difference shall be payable or repayable on or before the 31 st January next following the year of assessment. ”
“ (1) Liability to a penalty under any paragraph of this Schedule does not arise in relation to a failure to make a payment if P satisfies HMRC or (on appeal) the First-tier Tribunal or Upper Tribunal that there is a reasonable excuse for the failure. (2) For the purposes of sub-paragraph (1)— (a) an insufficiency of funds is not a reasonable excuse unless attributable to events outside P's control, (b) where P relies on any other person to do anything, that is not a reasonable excuse unless P took reasonable care to avoid the failure, and (c) where P had a reasonable excuse for the failure but the excuse has ceased, P is to be treated as having continued to have the excuse if the failure is remedied without unreasonable delay after the excuse ceased. ”
“ It has been said before in cases arising from default surcharges that the test of whether or not there is a reasonable excuse is an objective one. In my judgment it is an objective test in this sense. One must ask oneself: was what the taxpayer did a reasonable thing for a responsible trader conscious of and intending to comply with his obligations regarding tax, but having the experience and other relevant attributes of the taxpayer and placed in the situation that the taxpayer found himself at the relevant time, a reasonable thing to do? ”
“ Where an Act authorises or requires any document to be served by post (whether the expression "serve" or the expression "give" or "send" or any other expression is used) then, unless the contrary intention appears, the service is deemed to be effected by properly addressing, pre-paying and posting a letter containing the document and, unless the contrary is proved, to have been effected at the time at which the letter would be delivered in the ordinary course of post. ”