That’s complete and utter tosh.
Private companies routinely sent representatives to East European countries to recruit staff.
I recall a story of a bus firm, it might have been Stagecoach, winning a contract to run bus routes in Norwich and sending a recruitment team to Poland to recruit drivers despite there being PSV drivers available for work living in Norwich.
The Labour Party sending teams to East Europe to get people to emigrate to the UK is quite simply nutters giving themselves a handjob at the prospect of getting people to believe such a stupid story!
I worked with a large 3PL company who recruited in Eastern Europe for drivers
He had Polish and other Eastern speaking girls in the office who handled all their paperwork
His systems in the trucks translated their work to their native language
He had bought houses all round his depots and rented them rooms out
They were probably on 50p more than the minimum wage and he got a lot of that back off them in rent
I've worked on fridges as a driver and it's not just farms you go to where there are portacabins with overseas workers living in them.
I used to deliver every Sunday tomatoes from Holland to a company in the North West.
There would only be 1 or 2 English speakers on site on the manual work was all done by Easter Europeans.