“…so much of any income tax…to which [the taxpayer] is liable as by reason of the failure is unpaid on 31 January following the tax year”
"It is idle for any taxpayer to say to the Revenue, "hidden somewhere in your vaults are the right answers: go thou and dig them out of the vaults"
"the liability that remains unpaid due to the taxpayer's failure to comply ..."
“The cohort of taxpayers likely to be affected by HICBC is not readily identifiable from the information held by HMRC, especially when the recipient of the child benefit and the taxpayer liable to HICBC are not the same person, as is the case here.”