Family Business
Where a business is a “true” family business, that is where on death of the current proprietor it will pass to his spouse, children or grandchildren etc., and there is no intention to ever dispose of the business outside the family, the 100% relief means that such business assets are effectively taken completely out of the IHT net so (at least while 100% business property relief remains) no IHT planning in respect of those assets would appear to be necessary.
However, the problem still remains for other business assets.