The best play would be using zloty weakness on the exchange rate to invest in good commercial property in poland. Its still above 5 but should go a good deal lower over the next couple of years but to brexit fallout, at which point you could consider options to benefit from sterling upside, or sell up and reinvest proceeds in UK commercial.
Units/lokale uzytkowe in solid locations will provide good resale potential and you will looking at a yield of 6-9%, starting from a little below 1M zloty and upwards. You can buy cheaper but you may be stuck with dealing with private sole traders rather than proper large cap commercials which tend to sign longer term contracts. Units with long term contracts in place will command a higher price/m2 but sometimes can be good bolt on value, particularly if you feel the tenant will extend for another 5/10 year period, at which point the unit value goes up. Finally, stick to businesses you understand and keep away from banks for another couple of years, which tend to be on very nice contracts, but those terms will be unrepeatable when they leave.
