I hope to remove a wall between two rooms in a 1983 extension to my 1930s bungalow in Glasgow, Scotland. The extension is brick built cavity wall, the dividing wall is brick single skin, the rooms are 3.5m x 3.2m, and 2.7m x 3.2m, so the resulting single room will be about 5.2m x 3.2m. The roof...