Unfortunately its all a bit of a rush to sell our property here in the UK and trying to find a property in or around Gliwice.
In my opinion you should think about renting your property in UK... for no more than half of the rent there you should rent something similar here. On the other hand prices here will be growing (no so fast anymore but still) so If you stay here for many years or forever then that could be a mistake.
I did not know that Gliwice was an industrial city so that is nice to know.
Most of upper Silesia is one big industrial area, which used to be seriously polluted but It's much better now.