The Royal Mail has published a list of areas currently not receiving post as they battle the spread of coronavirus amongst staff.
The zones - comprising 27 in England and one in Northern Ireland - are no longer receiving regular post because of the high numbers of Royal Mail staff who are either off sick or self-isolating.
The affected areas include 13 in or near London, while others include Leeds in West Yorkshire, Chelmsford in Essex, Widnes in Cheshire and Margate in Kent.
With some affected residents complaining of not having had mail delivered for more than a month, fears have also arisen that elderly residents will not receive notifications of when a coronavirus vaccine is available to them.