Royal Mail aims to deliver to all addresses it has mail for, six days a week, however this is not always possible. Delays are often due to high levels of sickness absence, poor weather conditions, resourcing issues and local factors. The postal service updated customers on the status of deliveries today, Monday June 5, 2023. Royal Mail stated: "Royal Mail operates an air, rail and road network to move letters and parcels between our distribution hubs, mail processing centres and delivery offices around the UK." Over the weekend, Royal Mail's air and rail networks both "operated to schedule", however its road network was disrupted. READ MORE: Expert claims to spot moment William treats Kate like a 'naughty child'