Can someone check my CV please?

Its quite good. But your English is poor in parts. Your trying to use sophisticated language and expressions but they're coming out wrong. Your opening paragraph where you describe yourself is a good example of this. I'd clean this up or remove it completely, it seems a little out of place. Keep it simple. You have a lot of work experience which is good and you have described your duties well, which is all employers want. In your nurse experience, change "I had carried out..." to simply "I carried out.." You are mixing up tenses otherwise. But overall its great, especially your work experience. You shouldn't have trouble getting a retail job.