Did a building conservation course a few years back which covered damp proof courses and engineering bricks, showing pictures of how people had had to allow ins

Did a building conservation course a few years back which covered damp proof courses and engineering bricks, showing pictures of how people had had to allow insurance company-approved damp-proof “experts” to drill a cavity into the face of each engineering brick, inject some treatment, and then seal it off. Ugly, expensive, and totally unnecessary.