But they do integrate rather than forming communities
In general Delph, the kind of Poles that come to the UK do so to earn money (not all), they generally stick to their own Polish friends (not all), therefore they do not integrate in the full sense of the word, besides, there are areas in Manchester that are 'very' Polish, this isnt a problem, I couldnt care less. As for them not forming Polish communities, that was a joke right? There's the Polish Circle club on Cheetham Hill Road which has been there since Adam was a lad, why do you think that is? Possibly because there was a "Polish" community? There's also a Polish church in South Manchester (again been there since Adam was a lad), why do you think that is? Possibly a Polish community?
There's nothing wrong with it, they dont ghettoise areas, they simply tend to migrate to areas where they are in numbers.