This included 27 areas in England and one in Northern Ireland.
Royal Mail has now addressed possible delays across the UK and shared an update for customers.
In a statement published on the Royal Mail website today, it explained some offices are experiencing resourcing issues .
Royal Mail: It has issued an update for customers (Image: GETTY)
It continued: Deliveries and collections are taking place across the UK today. However, deliveries may be disrupted in some areas due to resourcing issues in a small number of our delivery offices. We’re working hard to deliver as comprehensive a service as possible to all our customers during these challenging times.