Unfortunately, accidents can and do happen. There are many forms of accident, but probably the most prevalent in a retail setting is slips, trips and falls.
Of course there are many ways of preventing or guarding against these accidents from happening, general good maintainence and shopkeeping will put you in a good starting position, where the probable items to cause a slip or trip will have been removed. Talking to your team about health and safety and ensuring that it is part of their everyday consideration will also help to make sure that the hazards that cause slips and trips will be dealt with as they occur.
I have seen many other people claim that health and safety is just a veil to prevent companies from being sued. I believe that putting up wet floor signs and clearing up spills straight away are part of a good culture, rather than a way to avoid potential legal action.
Now, I believe that there are two potential actions that can be taken after an incident it accident-
*clear the area completely to ensure a repeat does not happen.
*assess the situation before taking any action.
I think that both can have their up and down sides. I've seen managers and business owners rush to clear an area completely of any stock, fixtures, fittings and trolleys when a slip, trip or fall occurs. There is some logic behind this, but it can be flawed logic at times. If you have a health and safety culture, and have carried out risk assessments, etc then you would already have been aware that this potential was there. Moving every little thing from an area shows proactivity but also highlights a lack of foresight when risk assessing and potentially a degree of guilt that the area wasn't correctly prepared in the first place.
The second approach of really assessing the incident, including talking to anyone present, watching any relevant CCTV and speaking to the injured party would be a more holistic approach, more in keeping with a company with a strong health and safety culture. I believe that knee-jerk reactions will not necessarily provide an instantly safer environment as the time to assess and reflect hasn't been taken.