Remove roll over and iht relief and huge amounts of institutionally owned land would be sold, perhaps slowly but why hold land if the return is so poor?There was a global economic downturn in the early 90s with the USA going into
recession with confidence low and interest rates high.People back then thought
cash in the bank a safer bet where as the last 20 years it has provided a pittance on savings.
Quite different times it would take a lot to crash land prices now.
That said who knows what events unfold.
Actual farmers would probably benefit, maybe limit iht to a set amount would be a reasonable step say the first million above the normal £ 325,000 / 500,000 per person, for a family farm that would still add up to a fair chunk