In Ireland spouses inherit from each other tax free and once the estate passes to the kids each kid has a threshhold up to which they can inherit from parents of in excess of €478k (increases slightly each calendar year). Anything over that is taxed at 20%. In the UK there's a exemption limit on the entire estate value up to £255,000.  After that tax is payable on the remaining value at 40%.

So...you when buying your property abroad you need not only a will in that country, but also proper tax  and legal advice...otherwise that stack of treasure you were hoarding starts to be eroded by the wrong people...

We are all in the gutter, but some of us are looking at the stars. Oscar Wilde