Sorry, but at 27, I can almost guarantee you will not be offered an apprenticeship. You are just too old.
Most schemes have age limits and one of the reasons is that they want to mould you into the type of engineer that the company wants. You can do that to people straight out of school. At your age, you will be set in your ways.
You may find that someone will take you on as unskilled and pick it up as you go, but I don't see too many options for you.