Going to work yesterday morning and I hit an object in the middle of the road which caused the car to lift into the air. I looked in rear view mirror and saw part of car on road so got out to find rear bumper broken and diffuser lying on road. There was a concrete kerbstone which had obviously been dragged from layby by snowplough. I couldn't see anything under car for snow so continued to work but on closer inspection underbelly broken also broken crossmember and noise from engine and vibration from rear.