I posted this a while back Pete, but I'll repeat it here. There have been various studies into national beliefs and cultures, and perhaps obviously they found there isn't a narrow but rather a broad spectrum of beliefs within any nation. So if we take Poland as an example, there will be those leaning more towards a liberal bent and those leaning towards a more conservative bent. In Czech, for instance, residents of Prague tend to be very different in their mindset to those in the provinces.
Now, given that we tend to move to places that are reasonably like us, do you think that the Polish folks moving to Britain (a traditionally liberal culture) are going to be the urban, liberal types or the rural, conservative types? It seems intuitive to me, and consistent with my personal experiences, that the A8 migrants that come to Britain are the people who have most in common with traditional British values. That's why places like London thrive with such high levels of migration, because despite the huge variety of nationalities and cultures, there is much more that binds us all together than separates us.