Public Health England’s advice on handling post for businesses can be accessed:

https://www.gov.uk/government/publications/guidance-to-employers-and-businesses-about-covid-19/guidance-for-employers-and-businesses-on-coronavirus-covid-19 (updated 25/3/20)

This states that:

Staff should continue to follow existing risk assessments and safe systems of working; there are no additional precautions needed for handling post or packages”

Hence, our advice would be to minimise these risks by taking the following precautions:

Maintaining good hand hygiene:

https://www.nhs.uk/live-well/healthy-body/best-way-to-wash-your-hands/

This should include washing hands for at least 20 seconds before and after handling leaflets.  Handling of leaflets should be kept to the minimum (for instance printed notes may be preferable to handwritten notes).  Anyone with possible symptoms of COVID 19 (or with a household member in the 14 day quarantine period) should not be involved in leaflet production or delivery and should follow the self- isolation/household quarantine guidelines:

https://www.gov.uk/government/publications/covid-19-stay-at-home-guidance/stay-at-home-guidance-for-households-with-possible-coronavirus-covid-19-infection (updated 10/9/20)