Opencart image filepath

I've added a column to the database to store image file paths.

I've populated it with some sample images file paths in the following format - data/red_blue.jpg, data/red.jpg.

I've amended the controller and template files so the field is now available.

However when i call the image through it cannot find the file beacuse the file path is incorrect. Rather creating a full file path eg.

www.mywebsite.co.uk/image/data/red_blue.jpg

Its only calling in the file path as specified in the database field eg.

data/red_blue.jpg

Is there some code that i need to add to the controller to tell the page to add the image url (www.mywebsite.co.uk/image/) to the link?

thanks