The best way to integrate is through communication IN ENGLISH. Talk as you would talk to your native men. Have a joke. Ask questions about the English language that you find difficult. There will be words that you will not understand, such as slang. Teach them a few Polish phrases. Go out drinking with workmates. It's simple. Just do what you do in England as you would in Poland. The only difference is the language which you will get to grip with the longer you stay.
Try that. Have a look at employment agencies too (although these are often run by scoundrels). With better English, applying directly for jobs found advertised in local papers is not a bad idea.
An employment agency should be used as a last resort ONLY. I wouldn't recommend anyone going with an agency without first finding a job that offers a permanent contract. Note that an agency is temporary employment and can leave you without a job for weeks without given notice. Contact the Job Centre for for help in finding a PERMANENT job. jobcentreplus.gov.uk
What many Polish people make a mistake of is not doing any research on the place they're moving to in the UK. With perfect planning, research and patience you'll find an area that is peaceful, pleasant and a joy to live in. Those that do not plan, research or have patience generally move to areas of high crime. Dumps. Birmingham is a s--hole. Same goes for Nottingham, although there are a huge number of Polish there. I would recommend Kirkham, Wesham, Garstang, Fleetwood, Freckleton etc in The Fyldes of Lancashire. The crime is much lower than the national average in the Fyldes and there are considerably much less Asians/Africans. There are no "Asian communities" or "Black communities." It's a white area. I live in Kirkham and if you like to bring up your children in a safe, friendly, trustworthy town with plenty of activities then you'll love it. We also have police presence on the streets as there is a police station up the other side of town so you'll very rarely see any crime. I've yet to see ONE criminal act since I've moved here a year and a half ago, touch wood.
I'm going on and on I know but I stress.... DO SOME RESEARCH ON THE PLACE YOU WANT TO MOVE TO!
If you pick the wrong place you'll know about it. If you pick the right place you'll love it! Keep away from big cities.
I highly recommend choosing a town in the Fylde Coast, North-West of England in Lancashire. Statistically it is one of the best places for standard of living.
Take a look at these statistics of the Fyldes. Click the links that are of interest to you, such as 'Crime, Justice and Safety
', 'Economic Performance
,' 'Housing and Households
' etc and compare them to the rest of the UK. You'll see that it is one of the best places to move to. Birmingham is not a good place to move to at all.