Back in the day when I inherited, 1980 ish, barely out of university, I think it was called Capital Transfer Tax. I think the threshold was around £25,000. Even in those days London properties in my road were fetching around £150k, and I inherited two, so there was quite a big amount to pay tax on. It's all relative, so yes, a £2 or £3 million threshold for IHT now sounds reasonable in today's world.
As someone said earlier, I like to think family first. My parents left this world, albeit prematurely, at least knowing I was provided for with a roof over my head. In a happier world my mother would have lived to see me settled and produce her first grandchild, but this wasn't to be. The 7 year rule also didn't work for my parents, so I was stung by that too. I have paid my own inheritance forward as much as I can to my own children and grandchildren. At no point have I deliberately set out to avoid tax at all costs, nor got anywhere close to tipping over the border into tax evasion. It is not all about the money. Charity begins at home in my book.