The effects of the postal strike are uncomfortable for both the public and Royal Mail.
Competitive companies handling mail can easily take the lucrative work, leaving Royal Mail to cope with what is left.
Royal Mail is fully responsible for deliveries within the UK, whether they are profitable or not.
Undeliverable mail is also due to be returned to the sender, if at all possible.
Should the industrial action escalate, it will threaten the continuance of Royal Mail.
Roy Irvine, Belfast