Your CV looks good. I suggest that you arrange when you will be coming over and arrange a working visa (I will do what I can to help) before you send it out. For casual work like you suggest, you will probably be best approaching businesses face to face when you get here; I can help you find places to ask. If you want a more work experience role, you will be best setting out more what you can offer from a business perspective.
You will be pleased to know that the weather now is better than it was when your mum and dad visited last May! It was exceptionally cold then though! Ask your dad how cold he was at Stone Henge! (Brrrrrr). If you come over between May and July hopefully the weather will be ok for you!!!
Let me know how things develop and of course I will do what I can to support you.