Hi. The BCO doesn't want toothing, and modern brick sizes are different to my 1897 house. He has told me that he wants a vertical cut, 100 mm inwards ( where the mortar joint is ) and 100mm deep to prevent tracking. ( i know its pointless, but anyway). As per photo, i have removed a 1939 extension and need to make this corner 90 degrees. I will need to drill into the end brick in places to attach my wall fixing kit. Some places are ok, but a lot have only 30 to 70mm to build into, which is too small to fit a sliver of brick on to, and would have no strength to take a rawlpug and screw. Is my only choice to start dismantling my corner even further back, to make my brick and a third, into two equal bricks of half that size?