The British Standard for most disciplines advises that measures need to be taken to minimise vandalism and its impact on fire equipment. This is why most premises will require some form of ancillary equipment to be installed.
It may also be a requirement of your fire risk assessment that some form of ancillary equipment is required.
Ancillary equipment can also assist you minimising your Health & Safety risks. Placing covers on Fire Extinguishers for example can stop tampering or vandalism.