I wouldn't say anything to worry about structurally, in that the house isn't going to fall down, but it's not ideal and is the sort of thing that can be a hassle when selling. The main structure has slipped across the dpc. It's not a common fault but it does happen. There are lots of possible reasons. The last one I investigated was because the floor had been laid tight to the inner wall, with no expansion gap whatsoever. The floor expanded and pushed the blockwork (in that particular case) outwards. Not saying that is the issue with yours but the power of expansion and contraction is usually underestimated.