The HSE has reviewed this guidance, which gives advice on systems used to disinfect premises during the pandemic. It explains the legal requirements and provides the latest information, including joint advice from public health bodies on risks to health that can be created by using walk-through spraying or misting systems.
Specifically, it covers:
Risks from walk-through disinfecting systems.
Cleaning premises using fog, mist or UV treatment.
The law on disinfectants.
Only use products that meet regulatory requirements in the UK.
Supply and manufacture of disinfectants.
The guidance is available here.