Refer to the input text as context and select the correct relationship between 'Parcelforce' and 'Royal Mail' from the available options.
Options: director/manager, chairperson, parent organization, brand

The continuing downturn in letter deliveries pushed revenue in the company's UKPIL business - which operates in the UK collecting and delivering parcels and letters through the Royal Mail Core Network and Parcelforce Worldwide - down 2pc.
parent organization