Ok fixing another botch up from previous owners.
Imagine facing the window (from inside) On either side of the window the wall has been tiled halfway up the wall. Now what they must have done is....taken the window facing off, tiled up to the window and then put the facing back on. The facing is flush at the top of the window but they have flexed it out to cover the tiles further down. I need to now try and cut the tiles (in situ) in a straight line where the meet the window facing.
Any thoughts on how to do this. Angle grinder springs to mind.