Dave73-UK:
Thanks for the advice guys, yes have told them I have no tanker experience and only limited hgv experience.You advice hase made me feel a little more confident going into the assessment. So all good.
One more question, is there anything extra I need to look for on a walk around check other than all the pipes etc are secure?
Remind them you have no tank experience during walk around, and you should be ok. Ask questions yourself to show you are aware of your need to learn.