Thanks so much Skeez & Alison, your replies helped me plan and keep calm in the run up to my recruitment day.

It actually turned out to be a straight up one to one interview rather than the group event the website described, I think because it's a smaller store.

Interview went well, no nasty surprise questions, just went with the flow and felt surprisingly relaxed. This interview was so much more straight forward than the higher level roles I've previously interviewed for, I was positive but also honest and I think that was appreciated by the interviewer. Lots of positive body language from her.

I didn't even get asked why I left my last job (maybe because that was answered on my application), I did get asked about sickness as they have a very strict absence policy - thankfully I was able to truthfully answer I had no sickness in my last job.

All I have to do now is wait for a response one way or the other.