Royal Mail has introduced steps to ensure the safety of its workers after staff took strike action against the lack of measures in place against the spread of coronavirus.
Workers in Chatham, Kent, took industrial action on Thursday morning and have since returned to work after the company introduced social distancing measures and other aids such as latex gloves and extra hand soap.
The Communication Workers Union (CWU) had raised serious safety concerns after Royal Mail had told workers it is safe to work without full Personal Protective Equipment.
The CWU said their appeals for safer conditions were not met.
A Royal Mail spokesman said: "Royal Mail was disappointed that un-balloted industrial action took place this morning at the Chatham Delivery office.
"We sincerely apologise to customers in the area for any disruption to their mail services. All staff have returned to work and operating as normal.
"Royal Mail takes the health and safety of its colleagues, its customers and the local communities in which we operate very seriously. We have introduced a range of social distancing measures designed to protect both our colleagues and our customers.
"We continue to follow public health authority preventative guidance."