Thanks for the reply. The client is apt to change their mind on a frequent basis (three this week on the one page) so I think that he will want a more graphic look (coloured background, or images) . I did a quick test using a circle cut into quarters and then added into a unique gallery, set to display two per line and with no gutter. Seems to work OK for his requirements and worked on an iPhone as well.
One of my clients says they want to have a Venn syle diagram (4 interconnecting circles) each of which have a separate hyperlink) as a way of showing the four pillars of their business. I am considering getting a single image, cutting it into 4 and then adding to a unique library and then putting no gutter so it looks like the image is one. Can anyone suggest a better way?