Hi. It was me who took the photo above, last summer. It had the fence around it then, and the sign asking people to keep off the mizmaze. I'm surprised to hear that it is in such bad condition, considering how well-kept it was last year. The mizmaze is part of the Breamore House estate - try contacting them through their website. They have also fenced in the nearby Giant's Grave longbarrow (for its own protection) and last summer they had made a path through the crops in the field so that you could get to it and see it, as well as putting an information board on the fence.
If you want a mizmaze that you can walk on, try the one on top of St Catherine's Hill in Winchester. Its not so perfectly formed, but it is grazed by sheep to keep the grass down.
Jim Champion
Something is not right. This message is just to keep things from messing up down the road