Thanks all for the responses, I though I would post some pictures of what I have done so far.
I was looking at making my own charging point or EVSE as it is called in the UK, turns out in East Anglia you can get one installed for free, all they want in return is the ability to capture data of usage.
I will keep you posted on further events.
It's amazing what you can achieve with some cardboard and MDF, CAD takes too long for me. I am waiting for the battery box to be fabricated once that is done I will get it welded to the frame and build on top. I have ordered some auminium sheet and plate to replace the MDF once I am happy with where everything is going go.