I'm not too sure if I've just had my head under a rock all this time and this is common knowledge but I was really suprised to find this out.
For context, relatives of mine who are retired have a holiday home in Portugal and they have now decided to sell up in the UK and move to Portugal permanently.
Apparently, in last year's budget the rules were changed so that if you die within ten years of leaving the UK then you still have to pay UK inheritance tax (IHT) on your entire worldwide estate (not just any assets left in the UK).
So, if you've lived your entire life in the UK and then decide at the age of 75 to sell up and move abroad then, if you die before the age of 85, your entire estate is still subject to UK IHT.
Just another thing to have to consider if you're thinking about retiring abroad.