Workplace, Health, Safety and Welfare Approved Code of practice L24 Regulation 14 is a legal requirement which took effect from 1st January 1996, this stipulates that safety glazing should be made of safety material in all non domestic premises to, at very least, waist height in all windows and shoulder height in, or adjacent to, doors.
Prosecution may follow should an accident on your premises result in injury from unsafe glazing, and you may not be covered by insurance. these regulations are also incorporated into Building Regulations BS6262 Part 4, Safety, Human Impact.