Sorry guys - shiftwork kept me away for a day.
To bump things along, I think a large hint is required
I drive a fuel tanker, transporting a substantial quantity of stuff that is hazardous to life and the environment, etc. I require a special licence to do this...
Okay guys, see what you can do with that. It is my last shift tonight, so I will be back tomorrow morning to see how you go. Cheers, John.