“We do not think it could have been within the contemplation of the draftsman that HMRC should be required to make a decision on a taxpayer-by-taxpayer basis, since he must have been aware that it would be impractical to exercise a discretion (meaning a discretion exercised in respect of each taxpayer individually, rather than in relation to defaulting taxpayers as a body) in that way. Rather, we think, this provision too contemplates what HMRC have in fact done, that is decide in advance that all taxpayers who default for more than three months should suffer daily penalties. In other words, what was contemplated was that the discretion conferred by the provision should be capable of being exercised in respect of all taxpayers who default for the requisite period, or none; and if that is so the purpose of the notice is to inform taxpayers who are in danger of incurring daily penalties that HMRC have decided to impose them.”