Questions based on where you have worked before- the type of work, how many drops, type of industry, what job you like as a driver and what you dislike. All offices are different and yes it is informal but it's still should be treated as an interview.
Do you remember the last time you got drunk
How long have you been out
None they just want you to sign up
Answered - Van driver (Former Employee) - Plymouth
None. They just want you to sign up.
Answered - driver (Former Employee) - Leeds, West Yorkshire
Answered - HGV Driver (Former Employee) - Warrington, Cheshire