If your staff are working in an environment where they are susceptible to being in contact with irritants or hazardous substances, it's your duty as an employer to ensure staff a regularly assessed, in line with COSHH Regulation 2002.
Aside from the responsibility, you'll be demonstrating a priority on your staff's health and wellbeing in the workplace. As well as preventing long-term costs affecting your business.
Whilst it is possible for a patient’s GP to conduct a skin assessment, the pressure on NHS surgeries is currently so great that many employees are struggling to access primary care, and practices are struggling to meet demand. The employee’s GP will also be reluctant to share results with their employer and only the employee is able to obtain a copy.