“… section 152 (3) (Taxation of Capital Gains Tax Act 1992 ) clearly gives power to the Revenue, at its discretion, to allow an extended period within which the acquisition of the new asset may take place. No criteria are expressed in the subsection as to when the power should or should not be exercised. The matter is left entirely to the discretion of the Revenue. The exercise of that power by the Revenue would be susceptible to challenge by judicial review on the grounds of unreasonable ness or any other suitable ground, but it is not a power that can be exercised by the general commissioners.”
“.. In that case the discretion was explicit but clearly the principle applies equally (perhaps with even greater force) to a case where the discretion is derived merely from ‘care and management’ and the inspector has declined to disregard clear words of the statute, as a concession.”