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Alert level 2: guidance for employers, businesses and organisations

This Welsh Government document is intended to provide the essential information needed to help businesses, employers and other organisations or institutions meet the legal obligations they are under to minimise the risk of people being exposed to, or spreading, coronavirus on their premises.

The guidance document above applies to Wales. For the rules or guidance in the other parts of the UK, please visit the sites for England, Scotland and Northern Ireland.

Further guidance and services

COVID-19 workforce risk assessment tool

Check if you are at higher risk of more serious symptoms if you come into contact with COVID-19.

COVID-19 workforce risk assessment tool: guidance

COVID-19 workforce risk assessment tool guidance for managers and staff.

COVID-19 vaccinations: guidance for employers

Helps employers understand the implications of staff and customer COVID-19 vaccination status.

Workplace guidance for employers and employees: COVID-19

Welsh Government guidance for employers and employees to keep safe in the workplace during the coronavirus (COVID-19) pandemic.

Providing safer toilets for public use: coronavirus

Welsh Government guidance for the safe management of toilets used by the public during the coronavirus pandemic.

Remote Working

Remote working

How and why Welsh Government want to promote remote working.



Safety and physical distancing signs for employers

Safety and physical distancing signs for employers: coronavirus

Resources to help employers keep their workplace safe.

Air Cleaning Devices

COVID-19 transmission is usually through a result of exhaled virus or via the hands, so even where a person who is infected with COVID-19 has passed through a whole-body disinfection system/device, as soon as they breathe, speak, cough or sneeze they can still spread the virus to others.

The Welsh Government Technical Advisory Group (TAG) has published a short report summarising advice about air cleaning devices.  It draws on a summary of the research evidence set out in a longer paper published by Scientific Advisory Group for Emergencies (SAGE) in response to a request to evaluate the effectiveness of air cleaning devices in removing the impact of COVID-19 aerosols in indoor spaces.

 Key points include:

  • Air cleaning devices are not a substitute for ventilation and every effort should be made to increase ventilation before considering them.
  • Air cleaning devices may be of benefit in poorly ventilated spaces where it is not possible to improve the ventilation by other means, but are of little use in well ventilated spaces.
  • Air cleaning devices, where the primary principle of operation is based on fibrous filtration (such as HEPA filters) and germicidal UV (UVC), are likely to be beneficial if deployed correctly.
  • The performance of most devices is based on data measured in idealised controlled environments and is likely to be different and often lower in a real-world setting. Caution is therefore advised when considering manufacturer’s performance data.
  • SAGE suggested that further research is needed on the efficacy of devices including evidence of the technology against SARS-CoV-2 virus (or a suitable viral surrogate) and other pathogens and their performance in real-world settings. For these devices to be effective, there needs to be sufficient time for the air in the room to pass through the purifier.
  • There is a lack of evidence as to how effective such devices are when there is an infected person in the room - it is unlikely that these devices will be effective at mitigating short-range person to person transmission as they are designed to work in the background and not be in close proximity to individuals.
  • There may be unintended consequences from the application of air cleaning devices including a relaxation of other ventilation measures.

Further detailed information about the research evidence can be found in the Scientific Advisory Group for Emergencies (SAGE) report linked above.