If the Revenue told you this, then the rules have changed but I have never seen any amendments to leglisation. But if they said this and you are willing to take their word for this I would strongly recommend getting this in writing from them.
The following are section relating to interest against CGT. These are exact wording as I have copied and pasted.
Interest
s552
Interest paid by an individual or any non-corporate body is not allowable as a deduction for CGT purposes. There are no exceptions to this rule.
s553
Generally, for CGT purposes, interest, even if charged to capital, is not allowed as a deduction in calculating chargeable gains. The only exception is made in the case of a company. In relation to a company there is an exception so that interest is deductible if:
the company incurs expenditure on the construction of any :
building,
structure
or works
that expenditure was allowable as a deduction in computing a gain arising on the disposal of the asset,
that expenditure was defrayed out of borrowed money, and
the company charged to capital all or any part of the interest on that borrowed money referable to a period or part of a period ending on or before the disposal.
The amount of the capitalised interest is deductible in such circumstances.