824. Assets derived from other assets.

A special rule applies where the value of an asset (the 'new asset') is derived from any other asset (the 'original asset') in the same ownership, in a case where assets have been merged or divided or have changed their nature, or where rights or interests in or over assets have been created or extinguished. In such a case, an appropriate proportion of the allowable expenditure in respect of the original asset is attributed to the new asset both for the purpose of computation of a gain accruing on the disposal of the new asset, and, if the old