Gifts: business assets: non-trade use
If you are dealing with a claim to hold-over relief and the asset has been used for trade purposes for only part of the period it was owned by the donor you have to restrict the relief. You do this by reference to the length of that period over the total period of ownership. CG66992 shows an example of this type of case.
This restriction does not apply if the asset would qualify as agricultural land, but for the fact that it is used for a trade.