UK, Ireland /
50 babies a day born to Polish mothers in UK [81]
Give them a little more time.
It's not just about time, the wider point I'm trying to make is that when people come gradually in small numbers from a similar culture like say the Irish to Britain, they tend to completely assimilate, but when a single group of people from a different culture move in overwhelming numbers in a short space of time then they tend to congregate together, take for example the Mexicans in California, there is a parallel with post 2004 Polish immigration.
When there is already a large immigrant community present then a new immigrant would tend to be absorbed by them as opposed to the wider culture, for instance, if I went as an Englishman moved to Mongolia tomorrow , I would have no choice other than to speak Russian or Mongolian and would be forced to integrate with the local population , but if a Mexican moved to southern California tomorrow he could spend his entire life simply talking Spanish and eating living much the same way he would in mexico.