Move to a smaller home say £150k in Euroland .. Place the residual £150k in high interest account (needs to be risk free, may be all there is !). .. Paying, say 4.3% net of 20% savings tax.
Draw this lot down, monthly, like a reversed mortgage... rough measure, but not far out. 0.043 x £150k = £6450 half of this is £3225 (being average int over the whole 15yr period).
Let us draw down the cap plus int over 15 yrs £150k + (£3225 x 15) = tot amount to draw of £198k, divide by 15 x 12 = 180 = £1100 per month. tax already paid. (The precise amount by calc is £1126 pm)
Not to sure about your maths on this empip, you will be having a reduced income year on year if you are drawing of the capital, at a time when the cost of living is rising. And anyway Brown will still take it from you when you come back to the uk
Furthermore who the hell wants to live in romania or bulgaria, those are about the only places where you will a decent house for that price.
And the winters, brr
My idea , get as much as you can now from one of these schemes, and either give to your kids as deposits for a house or whatever, no kids then spend it on holidays , or anything you always wanted, better than it all or most going to the state when you've lost the plot.
Another advantage of my way is that you avoid inheritance tax.