We had a really rubbish IHT situation.
FIL owned house - not in joint names as he was....well, ahem, a little old fashioned and not the nicest person I'd ever met.
On his death 50% of house ownership transferred to his wife, 50% split between the children. Wife has life interest in property, so will always live there and proceeds of sale must be used to buy her a new property if she wants to move.
BUT the 50% value was above the threshold - they had lived there 50+ years, put in electricity, extended/improved it etc.
So we got to pay IHT on a propery we will not be able to realise capital from until after MIL dies, even if she downsizes to a smaller property.
So to say that wealthy educated people are not affected (as they rewrite wills, avoid etc)if you have a selfish patriarch at the head of the clan.
Also to second what someone else commented to ww "It may hit harder in the SE but then people in the SE (or West Country)who already own property have benefited more from price inflation. You can't have it both ways" people in the SE only benefit if they move out of the SE to a less expensive area.
If they sell their highly value-inflated house, they then have to buy another highly-inflated one if they wish to stay in SE