<ul data-eligibleForWebStory="false">Royal Mail has been authorized to cease Saturday deliveries of second-class letters as part of new regulations by Ofcom.The changes reflect the dwindling use of postal services, potentially saving Royal Mail £250m to £425m annually.First-class letters must still be delivered the next working day, while second-class letter prices will have a capped increase.Ofcom has adjusted delivery targets, with Royal Mail facing criticism from unions and other groups for its handling of postal services.