This, plus they come with less tattoos, better education and manners.
Fewer tattoos.
It's really difficult for British people to get jobs at the moment, if an employer is ramping up their team size they'll inevitably turn to an agency to provide them X employees who will have been recruited in eastern Europe, and will have accommodation close to the employer and/or transport set up for them.
The problem is particularly exacerbated for young people, the pervasive nature of multi-culturalism means that we have spawned a generation who speak Multicultural London English (MLE) which put off employers who will generally be from the middle classes. I have to wonder if someone who speaks Polish with a lower class accent would put off potential employers in this country?
In recent times we've seen more and more businesses relocate away from expensive towns and cities to out of town locations. So unless you're recruited via an agency and get nearby accommodation set up for you, how do you get there if you live 5, 10, 20 miles away and are young and the job is minimum wage? Can't drive because insurance premiums are too expensive, train fares are too expensive and only go to the centre of towns and cities, bus services to these places are infrequent or non-existent or being cut, cycling is dangerous and you'll probably have your bike nicked anyway.
Undoubtedly declining state education standards are part of the problem, imo this all started back when I was at school in the '80s and early '90s. We got told that spelling and grammar didn't really matter (despite being in the top set) - err guess what? in the real world it does. We had a uniform, but got told it didn't matter if we didn't wear it properly - in the first year a kid wearing trainers would be sent home, by the fifth year around 50% of kids were wearing them. Discipline ceased to be a priority in schools. Subjects for the less-academic children such as horticulture, child care, woodwork, metalwork all got cut and the kids told to do Maths, Science, English, Geography and History instead. Needless to say, teaching someone who was only ever destined for unskilled manual labour about the Repeal of the Corn Laws became a struggle for teachers.
Edit: One other thought still relating to my school days, the policies of selling off school playing fields and permitting unchecked growth in junk food has resulted in lots of people quite frankly being unfit to do manual labour.