As described, a very small amount of the neighbour's plaster was dislodged during our chemical injection. These sorts of things happen from time to time & the important thing is to apologise and put things right... as we did. Unfortunately, it's difficult to explain how your electrics failed. Trip switches can trip, and fuses blow - these are common issues. Our plasterer wasn't aware that anything was wrong at time of completion. We always remove our waste material. However, we understand that a couple of small bags may have been put in the skip outside your property. For this we apologise again - it certainly isn't our normal practice. We are pleased that your experience with our surveyor and main team was good - and it's always annoying if the last bit of the experience (the plastering) goes adrift.