After all this sitting and looking at the plot I have come up with the first stage design which I am sure will change but for now gives me something to work towards.
I have decided not to dig up the whole space but to opt for 6 separate beds with a working area at the top and an area at the the bottom for compost bins. This design means that I can define the growing areas more easily and have pathways inbetween.
Having paths allows better access to the growing spaces without having to walk over the soil. It also means that if there is ever a time when I have nothing better to do I can grass seed them a little at a time but still have full access to the more important vegetable patches.
As much as I’m in this for the food I still want my plot to look good!