Stamp duty if you have investment property abroad

[Dumutrova]

Hi there,
I was wondering if anyone could give me an insight on something I am contemplating for a while

Me and my partner are in a process of buying an investment property abroad with the view the deal to be concluded within a year. So year after now we should be the rightful owners
We would like to move house in UK in 2 years time(we currently own a home, we just want to move) and I was wondering if we will be subject to the additional 3% stamp duty for second property, and if I have to declare the property abroad?

Thank you for your help

From the Government's website on stamp duty:

You must pay the higher SDLT rates when you buy a residential property (or a part of one) for £40,000 or more, if all the following apply:
-it will not be the only residential property worth £40,000 or more that you own (or part own) anywhere in the world.
-you have not sold or given away your previous main home