Do you think they would jeopardise their income by reporting the incident if they thought there were no witnesses and there was no damage to their vehicle and if they are identified as the cause they can just say they didn't realise?
Sainsbury's and their delivery vehicles need to take responsibility for their actions. Everyone agrees there are problems accessing the store but Sainsbury's have not alleviated this effectively; the expansion of the store a few years ago involved redesigning the access but the lorries, contrary to their written instructions, drive illegally and dangerously. This situation is exacerbated because Sainsbury's do not deal with offending drivers effectively.