· Angles for recession planes shall vary with the direction or bearing of each site boundary according to the diagram set out in D.2 below. They shall commence at points 2.5 m above internal site boundaries for all buildings.
· The recession plane angle shall be calculated by orienting both site plan and relevant diagram to the true north, placing the recession diagram over the site plan with the circle tangential to the inside of the site boundary under consideration. The recession plane angle shall be that indicated by the diagram at the point where it touches the site boundary. Where recession lines fall between those indicated on the diagram, interpolations shall be made. On irregular boundaries the same principles shall apply with the recession operating at right angles to all parts of the boundary line.
· The level of site boundaries shall be measured from filled ground level except where there is an existing building at a lower level on the other side of a common boundary, where that lower level shall be adopted.
