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Good afternoon, You have given me advice piecemeal. I am meeting shortly with my neighbour and would greatly appreciate it if you could give me a comprehensive advice incorporating those pieces which were positive. I have drafted the advice from your previous advices. THUS If the wall is yours, the boundary is on the far side of the wall as the wall is on your property. Here your neighbour cannot refuse you access for maintenance. The boundary is deemed to extend to the outer edge of the footings as this is the edge of the "wall". A landowner owns the air above the boundary which here would be over the footings. Thus anything located between the face of the wall and the outer edge of the footings will belong to the landowner and be within the boundary of his property. This or something very similar would be most helpful. Many thanks PETER *****