"(1) A company which is required to deliver a company tax return and fails to do so by the filing date is liable to a flat-rate penalty under this paragraph. ... (2) The penalty is-- (a)£100 , if the return is delivered within three months after the filing date, and (b)£200 , in any other case. (3) The amounts are increased to£500 and£1000 for a third successive failure, that is, where-- (a) the company is within the charge to corporation tax for three consecutive accounting periods (and at no time between the beginning of the first of those periods and the end of the last is it outside the charge to corporation tax), (b) a company tax return is required for each of those accounting periods, (c) the company was liable to a penalty under this paragraph in respect of each of the first two of those periods, and (d) the company is again liable to a penalty under this paragraph in respect of the third period."
"For the purposes of this Act, a person shall be deemed not to have failed to do anything required to be done within a limited time if he did it within such further time, if any, as the Board or the tribunal or officer concerned may have allowed; and where a person had a reasonable excuse for not doing anything required to be done he shall be deemed not to have failed to do it unless the excuse ceased and, after the excuse ceased, he shall be deemed not to have failed to do it if he did it without unreasonable delay after the excuse had ceased."
"the test of whether 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 [taxpayer] 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 in at the relevant time, a reasonable thing to do?"
"On an appeal against the determination of a penalty under section 100 above section 50(6) to (8) of this Act shall not apply but-- (a) in the case of a penalty which is required to be of a particular amount, the First-tier Tribunal may-- (i) if it appears ... that no penalty has been incurred, set the determination aside, (ii) if the amount determined appears ... to be correct, confirm the determination, or (iii) if the amount determined appears ... to be incorrect, increase or reduce it to the correct amount, ..."