Was intimidated into continuous driving for 9 hours. rarely having breaks. they were on the phone if you were behind, and wouldnt expect you to stop the vehicle to answer the phone. As the "end delivery", any errors in picking, was put down to you, irrespective of "if it was your fault".
Zero hours was unhelpful, but if you want to get back into work that may be your ticket. I'd love ACAS to do a flying visit. But thats my own opinion