Royal Mail could be allowed to cut its letter deliveries to five days a week or three under options put forward by the industry watchdog as it warned the UK postal service risks becoming "unsustainable" without reform.Ofcom said Britain's universal postal service "must modernise" as it outlined proposals for its overhaul following a review amid calls from Royal Mail to ditch Saturday letter deliveries due to slumping demand.

Royal Mail could be allowed to cut its letter deliveries to five days a week or three under options put forward by the industry watchdog as it warned the UK postal service risks becoming "unsustainable" without reform.Ofcom said Britain's universal postal service "must modernise" as it outlined proposals for its overhaul following a review amid calls from Royal Mail to ditch Saturday letter deliveries due to slumping demand.