The HSE requires employers to provide a first aid kit as a minimum and ideally one that meets British Standards.
While there are no specific legal requirements for what needs to be in the first aid kit itself, the contents should always reflect and be influenced the outcome of the organisation's first aid needs assessment.
The HSE details an example of what could be included in a first aid kit for a low hazard environment, but every workplace is different and you must ensure it is suitable for specific hazards that your organisation may face.
For more information, you can download our complete guide 'First aid provision in the workplace: A Guide for Businesses'.