A haulier I know well took on a driver that had been working for them via an agency, sure enough a bill for a large amount of money appeared at said hauliers for the introduction fee, went to court and my subbie lost and had to cough up a few grand.
Now if they want to take someone on, I ‘employ’ them for a few weeks, invoice my subbie , they pay me, I pay the driver, all happens the same day with BACS.