We've got a site rebuild underway using Opencart 18.104.22.168. It's using a modified default theme.
We require additional functionality to allow:
1) An extra "short product description field" that will be displayed on the product page.
2) Category page product thumbs to display product variations - size and colour (colour inc thumbnails)
3) Related products (on product page) are to display the similar product variation information as in point 2.
Design information is attached.