Its not just polish workers.
For example in London many of the cleaning companies are it seems latino (mainly south american from the few convos with a smattering of portugese and spanish workers as well) Untill recently no one else wanted the jobs so it was the lowest of the lows. But now i notice British people (of all colours) are now not a rare sight. The same in supermarkets and even in factorys.
When the underclass and the migrant workforce get squeezed where do they go?
Already in Victoria particularly and other parts of central London there are dozens if not hundreds of Eastern european rough sleepers, also people from other races and an increase in British (again of various colours).
Check out the queues in Rochester row when your next down in the SW1 area joe huge queues for the shelter down there.
Many of the non european black market workers, i doubt are here legally and so will slip in to a tiwllight zone on the streets. Who will police them and look after there basic needs (remeber these people are often duped into being here and never wanted to be a burden on the country just earn a decnt wage)
Regardless of poltical party both would have done the same, hundreds of thousands (they think no one is sure) came here in the good times fair doo's i would most likely do the same. But no one seems to know how we will deal with the problem as we know now not if but when a bust situation comes as it invariably will as history will tell you for hundreds if not thousands of years.
Communties are going to become more insular and look after one another and all the respect and learning about cultures is not going to help in the short term (we should never stop doing the two things thou). Radical ideas and steps need to be created by the mainstream and quickly to stop potentially nasty situations occuring.
Otherwise normally barely tolerate groups such as the BNP, other extreme racial and religous groups will step in.