The service has suffered disruption, particularly during the Troubles, when it was regularly halted by bomb threats.
Neither firm suffered enough disruption from the attack that it needed to take a charge against earnings.
It has since resumed publication, but the Prince said press freedom was suffering "serious disruption."
In other sectors, the transport network suffered little disruption however.
But the city's John Lennon airport has not suffered disruption.
The school continued to operate normal classes until 1942 but from the onwards suffered increasing disruption.
Late in the 1370s and early in the 1380s the world order, already upset by long war, seemed set to suffer yet further disruption.
American suffered similar disruption last year when hundreds of its pilots called in sick.
Most of the scheduled routes suffered only slight disruption as a result.
The local residents of Buckinghamshire would suffer disruption from construction for about four years.
