Draw up a Checklist like the following. The following items are not exhaustive and are for guidance only.

Access/egress - entrance/exit, stairs etc
Housekeeping - cleanliness, tidiness, walkways/corridors/stairs/obstructions
Temperature and ventilation - heating, air conditioning)
Lighting
Floors - worn carpets, slippery surfaces
Toilets - washing facilities, cloakrooms
Noise
Computers, workstations, chairs, RSI
Chemicals, Toxic Substances (COSHH)
Equipment and furniture - plant, powered vehicles
Electrics
Fire precautions, extinguishers, exits
Health problems - stress
First Aid facilities
Accidents
Dust
Ionizing Radiation
Manual handling
Vibrations
Protective clothing/equipment
Contractors activities
Security measures
Public safety issues
Safety Notice boards, Safety Policy Notices

In addition to this basic checklist, there are more specific and elaborate checklist

For Farm Visitors by UKASTA

Elmbridge Borough Council H&S Work Checklist

Checklist for small businesses from Business link has loads of questions and is appropriate for farms and holdings. Copy the "printable set of questions" that covers manual handling, repetitive task, hazardous materials, working at height, working with guarded machinery, stress, transport, surfaces and vibrating tools. And you can do it online and it gives you a score!

Wherever you have special procedures, there should be a checklist. Who is responsible for a checklist and carrying out inspections?.