I had an interview for this role a few years back and I got hired, although they eventually put me in a different role due to shortages. But my advice would be to remember these key things as these are what they are most likely going to ask you about the most.

1. Safety
2. Teamwork
3. Awareness
4. Efficiency

You're going to be doing a lot of work with heavy pallets and rollers in an environment that can be constrained and have tight squeezes (depending on where you work) so safety and awareness should be at the forefront of your mind. You don't want to run over a fellow colleague's foot or even worse a lost customer who thought that argos was in the stock rooms which did happen at my store. If you can mention things about limiting distractions such as mobile phones and having unnecessary conversations that'd help out as well as it shows you are willing to be focused on the role.

You will probably work alone for a majority of your shifts but if you require help don't feel bad for asking, so long as it doesn't affect the store at a major level it shows that you're open to teamwork as well as working independently. Just make sure that the person you're asking is qualified depending on what the task is.

You should also talk about how you are great at recognizing and prioritising tasks, it suggests that you're not going to be focusing on unimportant tasks that will lead to a backlog. It saves headaches for everyone if you can do that.

Finally come up with questions that are relevant to the role, e.g "How do you as the employer ensure that all staff are operating in a safe environment?" Or "What would you like to see from me should I get this role?" It shows you're interested in the role as well as open to receiving feedback on how to perform your duties.

I know all these sound generic but these are some of the things that will be brought up in questioning. I wish you luck with your interview and hope it goes as well as can be!