Hey don't worry about it , what matters is that you did the best you could . It's ok to be a bit nervous because it is a pretty nerve wracking process and I'm sure the interviewers know that and they're more focused on your answers . The aim of the competency based interview is to see if your past actions suggest that you would be well suited to the apprenticeship so as long as you were able to answer the questions I think they give you some leeway . Well done though : ) at least it's out of the way now .